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Cleaning vs sanitizing brewing gear

Cleaning vs sanitizing brewing gear: why you need both, which products do which job (PBW, OneStep, Star San, iodophor), label use and a routine.

Updated November 2026 · 7 min read

The lid of a white plastic fermenting bucket fitted with an airlock
Photo: Odour Lock, CC BY-SA 3.0, via Wikimedia Commons
The short version
  • Cleaning removes visible and invisible residue. Sanitizing kills most of the microbes left on a clean surface. You need both, in that order.
  • PBW, OneStep, B-Brite and oxygen washes are cleaners. Star San, Saniclean and iodophor are sanitizers.
  • Star San is an EPA-registered no-rinse sanitizer at label dilution (EPA Reg. No. 65001-1). Use every chemical only as its label directs.
  • Clean right after use, sanitize right before use, and only sanitize what touches cooled wort or beer.
  • Wear eye protection with acids and powders, and keep brewing chemicals away from children and food prep.

Cleaning vs sanitizing is the first lesson in every brewing textbook for a reason: most spoiled homebrew comes from a dirty surface, not a bad recipe. The two words describe different jobs that need different products. Cleaning lifts off soil, protein, hop resin and yeast. Sanitizing reduces the bacteria and wild yeast that remain to a level that can’t compete with your yeast.

Neither one sterilizes. As BYO puts it, only autoclaving fully sterilizes; brewers aim for “sanitary,” which is enough because healthy yeast quickly takes over. This guide sorts common products by job and gives a routine you can repeat every brew day. All dilutions and contact times come from each product’s label, which you should read before use.

Cleaning vs sanitizing: what is the difference?

Two jobs, two kinds of product

CleaningSanitizing
GoalRemove soil, film, protein and yeastReduce microbes on an already clean surface
WhenRight after use (and before storage)Right before contact with cooled wort or beer
Typical productsPBW, OneStep, B-Brite, oxygen or alkaline brewery washes, unscented dish soapStar San, Saniclean, iodophor (BTF)
Mechanical help✓ Soak, scrub with a soft brush, recirculate✗ Just wet all surfaces for the label contact time
Rinse afterward✓ Usually, per label~ Star San and iodophor are no-rinse at label dilution
Works on dirty gear✓ That is the point✗ Residue shields microbes

Source: BYO: Proper cleaning and sanitation; Palmer, How to Brew

A useful rule: anything that touches the wort before or during the boil only needs to be clean, because the boil sanitizes it. That is why an immersion chiller usually goes into the kettle for the last 10–15 minutes of the boil. Anything that touches the wort after it cools must be clean and sanitized.

Cleaners: which one for which job

Brewery cleaners come in a few families. BYO describes peroxide-based cleaners such as PBW and Craft Meister Oxygen Brewery Wash, used in hot water at the maker’s dilution, often as a half-hour soak; and caustic or alkaline cleaners such as BLC and Craft Meister Alkaline Brewery Wash, which work in cold water and suit draft lines.

A twin-bubble airlock, a drilled lid, a bung and a drill bit laid out on linen
Small parts like airlocks and bungs hide residue; clean them first.Photo: Veganbaking.net from USA, CC BY-SA 2.0, via Wikimedia Commons
ProductUseTypeSizeEPA reg.
Five Star PBW Alkaline Cleaner, 1 lbCleaner (not a sanitizer)Non-caustic alkaline powder1 lb—
Logic OneStep No-Rinse Cleanser, 2.5 ozNo-rinse cleanser; 2-minute contact timeOxygen-based powder2.5 oz—
BSG HandCraft B-Brite Cleanser, 8 ozCleaner; 1 tbsp per gallon; rinse requiredPowdered cleanser8 oz—
Craft Meister Oxygen Brewery Wash, 16 ozCleaner; rinses cleanOxygen-based powder16 oz—
Craft Meister Alkaline Brewery Wash, 16 ozCleanerAlkaline powder16 oz—
National Chemicals BLC Beverage Line Cleaner, 2 x 32 ozBeer-line cleanerLiquid line cleaner2 x 32 oz—

Specs as listed by the maker or seller; check the listing before you buy.

OneStep is marketed as a no-rinse cleanser. It is not registered as a sanitizer in the sources we checked, so treat it as a cleaner and follow it with a sanitizer for anything that touches cooled wort.

Cleaning tools that won’t scratch

Use soft brushes and cloths on plastic. Scratches in buckets and PET hold bacteria where no sanitizer can reach. A carboy brush and a jet washer handle narrow necks.

Sanitizers: label use only

The sanitizers homebrewers use are acid-anionic blends (Star San, Saniclean) and iodine-based products (iodophor). Each is registered for food-contact sanitizing at a specific dilution and contact time printed on the label. Use that dilution; stronger is not better, and weaker may not sanitize.

65001-1EPA registration number for Star SanEPA label letter
1 fl oz / 5 galStar San use dilution in the maker’s directions (confirm on your label)Five Star directions; EPA label
~160°FWater temperature BYO gives for peroxide cleaners such as PBWBYO: Proper cleaning and sanitation

Star San foams. The foam is the same solution, and at label dilution the maker’s directions say no rinse is needed, so don’t fear the bubbles. Mix it with distilled or soft water if your tap water is hard; a cloudy solution has lost strength and should be replaced.

About bleachUnscented household bleach can sanitize glass and plastic only when used exactly per its EPA label for food-contact surfaces, and it must be rinsed thoroughly. BYO warns never to use it on stainless or other metal, and chlorine residue can cause medicinal chlorophenol off-flavors. Brewing-specific sanitizers are easier and safer.Source: BYO: Proper cleaning and sanitation

A brew-day cleaning and sanitizing routine

  1. Clean after the last brew

    Rinse fermenters and bottles immediately after use. Soak in cleaner at label dilution, scrub gently, rinse, let dry and store covered.

  2. Mix sanitizer before you start

    Fill a bucket with sanitizer at the label dilution and a spray bottle for small parts. Note the time so you can respect the contact time.

  3. Sanitize only the cold side

    Fermenter, lid, airlock, stopper, auto-siphon, tubing, thermometer, hydrometer and test jar, spoon used after the boil, and the scissors for the yeast packet.

  4. Wet every surface

    Swirl or spray so the whole inside surface stays wet for the label time. Drain; with no-rinse sanitizers, don’t rinse with tap water.

  5. Keep sanitized parts in the bucket

    Small parts can wait in the solution until you need them. Sanitized hands and a spray bottle handle the rest.

  6. Clean again before you go to bed

    Clean the kettle and chiller right away; dried wort and hop residue are much harder to remove the next day.

Printable brew-day log and recipe sheetAdd a sanitation check to your brew log so you never wonder whether the siphon got sanitized.

How clean is clean enough?

Clean means no film, no smell and no residue you can feel. A few quick checks catch most problems before they reach the beer.

  • Look with a flashlight. Shine it into buckets, carboys and keg necks. Brown rings of dried krausen or hop residue mean another soak.
  • Smell it. A clean fermenter smells of nothing. A sour, vinegar or solvent smell means residue or a past infection lingering in scratches or gaskets.
  • Feel it. Run a clean finger over plastic surfaces. Slick or tacky film is protein or biofilm; soak again in an oxygen cleaner.
  • Check the small parts. Spigots, valves, airlocks and siphon tips hide residue. Take spigots apart and soak them every batch.
  • Replace what can’t be cleaned. Vinyl tubing that has turned cloudy or stained, deeply scratched buckets and hardened gaskets are cheap compared with a lost batch.

After a batch that tasted sour, medicinal or oddly buttery, treat everything that touched it as suspect: clean, sanitize and replace soft plastic parts before the next brew. Our off-flavors guide helps work out whether infection was the cause.

Bottles, kegs and lines

Rinse bottles right after pouring and they rarely need more than a soak. A bottle tree and a rinser make sanitizing 50 bottles quick. Kegs need full disassembly now and then, with O-rings checked or replaced. Draft lines need regular cleaning with a line cleaner; dirty lines can harbor bacteria that cause buttery diacetyl and sour flavors, according to BYO.

Empty brown beer bottles seen from above on a white surface
Rinse bottles right after pouring so they never need scrubbing.Photo: Thomas Picauly ma5ly, CC0 1.0, via Wikimedia Commons

More detail in how to bottle homebrew and how to keg homebrew.

Chemical safety

Brewing chemicals are concentrated acids, alkalis and oxidizers. The label is the legal set of directions for each one, including protective gear and first aid.

Nitrile gloves, safety glasses, ear defenders and a dust mask laid out on a table
Gloves and eye protection for alkaline cleaners and acid sanitizers.Photo: Aidar.seralin, CC BY-SA 4.0, via Wikimedia Commons
Chemicals: label directions onlyUse sanitizers, cleaners, acids and salts only at the dilution and contact time on the label. Wear eye protection with acids and powders, add acid to water, keep them away from children and food prep. Star San is EPA-registered (Reg. No. 65001-1) as a no-rinse sanitizer at label dilution.Source: EPA Star San label
  • Wear safety glasses when handling powders and concentrated acids; gloves for long soaks.
  • Add chemicals to water, not water to chemicals.
  • Never mix products (for example, bleach with acid sanitizer). Rinse cleaners out before sanitizing if the label says so.
  • Store sealed, labeled and out of reach of children, away from food prep.

Mistakes to avoid

  • Sanitizing without cleaning. Residue protects microbes.
  • Using abrasive pads on plastic. Scratches can’t be sanitized reliably; replace scratched buckets.
  • Over-concentrating sanitizer. It doesn’t work better and may leave flavors; follow the label.
  • Rinsing no-rinse sanitizer with tap water. That reintroduces microbes.
  • Scented soap. Fragrance carries into the beer. Use unscented products.
  • Treating OneStep or PBW as a sanitizer. They are cleaners.
  • Letting dirty gear sit. Dried krausen and hop residue take far more effort to remove.

Which products to keep on the shelf

  • Minimal kit: one cleaner (PBW or OneStep) and one sanitizer (Star San or iodophor), plus a soft brush.
  • Glass and narrow necks: add a bent carboy brush or a carboy washer.
  • Kegging: add an alkaline line cleaner and a hand-pump line kit.
  • Hard water: mix sanitizer with distilled water so it stays clear longer.

First batch coming up? Go through the full process in how to brew beer at home, and see the cleaning and sanitizing category for every product.

Gear picks for this guide: best brewing sanitizers and cleaners.

VerdictClean everything after use with a brewery cleaner, then sanitize only what touches cooled wort, right before you use it, with an EPA-registered sanitizer at label dilution. That two-step habit prevents more bad batches than any other.
Printable brew-day log and recipe sheetFree brew-day log: record recipe, water and salts, mash, gravities, yeast, fermentation temperatures,…

Questions

What is the difference between cleaning and sanitizing?
Cleaning removes soil and residue from a surface. Sanitizing reduces the microbes left on a clean surface to a safe level. Sanitizers don’t work well on dirty surfaces, so clean first.
Do I need to rinse Star San?
No, not at label dilution. The maker and the EPA-registered label describe it as a no-rinse sanitizer when used as directed.
Is Star San foam safe?
The foam is the same diluted solution. At label dilution it doesn’t need rinsing and won’t harm yeast or beer.
Is OneStep a sanitizer?
It is sold as a no-rinse cleanser. Treat it as a cleaner and follow with a registered sanitizer for anything that touches cooled wort.
How long does diluted Star San last?
It keeps working while the solution stays clear. Mixed with distilled water and stored closed, it lasts much longer than with hard tap water. Replace it when it turns cloudy.
Can I use bleach to sanitize brewing equipment?
Only on glass and plastic, exactly per the bleach label for food-contact surfaces, with a thorough rinse. Never on metal, and never mixed with acid sanitizers.
Do I need to sanitize the kettle?
No. Clean it well; the boil sanitizes the kettle and anything that goes in during the boil.

Sources

  1. BYO: Proper cleaning and sanitation
  2. EPA: Star San label, Reg. No. 65001-1
  3. EPA: Pesticide product label system (search labels)
  4. John Palmer, How to Brew (sanitation chapter)
  5. BYO: Judging off flavors
  6. American Homebrewers Association: How to brew