Physical cleaning matters more than the product, and I found no independent test that ranks dishwasher cleaners on mold. The sources I read agree on the same routine: scrub the gasket, filter, and drain area, then run a hot cycle with a dishwasher cleaner, white vinegar,r or baking soda. The EPA says dead mold can still cause allergies, so it must be physically removed, not just killed. Affresh tablets are the best-known manufacturer cleaner, but the Affresh page I read does not mention mold. Skip bleach unless your manual allows it, and never mix it with vinegar or other cleaners.
Read More: Septic Safe Dishwasher Cleaner: What to Look For
What the Evidence Says About Cleaners
| Claim | What I found |
| A product is proven best for mold | No independent test found. A listicle I checked (FaucetFam) describes no testing, and several of its products are descalers, not mold cleaners |
| Affresh removes mold | Its page doesn’t mention mold; it claims odor-causing bacteria, limescale,e and grime |
| Finish removes mold | I could not read Finish’s site (it blocked access). Sears names Finish as a monthly disinfectant |
| Vinegar works | Recommended by Sears, PuroClean, Southern Living and Whirlpool; no test found |
| Bleach works | Sears says it works but use cautiously; the EPA doesn’t recommend it as routine practice |
Cleaner Options Compared
| Option | What the sources say | Cautions |
| Affresh tablets | Manufacturer: 6 tablets per package; calls itself the #1 recommended dishwasher cleaner brand by Whirlpool, Maytag, KitchenAid, Amana and JennAir (all owned by Whirlpool); EPA Safer Choice certified; septic safe. Whirlpool‘s page: one tablet in the detergent tray, a second at the bottom if buildup is heavy | Mold not mentioned; endorsements come from the same corporate family |
| Finish dishwasher cleaner | Named by Sears Home Services for monthly disinfection | I could not read Finish’s own page |
| White vinegar | A cup in a dishwasher-safe container on the top rack, hot cycle (Sears, PuroClean, Southern Living). Whirlpool says 2 cups on the lower rack, normal cycle, heat dry off, no detergent | Whirlpool: acid can damage the dishwasher if used too often |
| Baking soda | A cup on the tub floor, then a short hot cycle (PuroClean, Southern Living). Whirlpool: run after vinegar, never at the same time | Absorbs odors; no mold test found |
| Bleach (diluted) | Southern Living: option for heavy mold, check the manufacturer first; Sears: works but can damage components | PuroClean: not for stainless interiors; never mix with vinegar |
| Hydrogen peroxide | Sears lists it as an effective alternative | No other source mentions it |
Where the Sources Disagree
| Question | Source A | Source B |
| Is bleach OK? | Southern Living: diluted bleach for heavy mold; check manufacturer | PuroClean: don’t use in stainless steel interiors; EPA: not recommended as routine practice |
| Vinegar amount and rack | Sears and Southern Living: one cup on the top rack | Whirlpool: 2 cups on the lower rack |
| Vinegar with baking soda | Sears: baking soda overnight after vinegar | Whirlpool: run them separately, never at the same time |
| Frequency | Whirlpool: monthly | PuroClean: every one to two months |
| Hottest cycle | Southern Living: hottest cycle, ideally at least 140°F | Whirlpool and others: a normal or hot cycle |
Step-by-Step: Remove Mold From a Dishwasher
Combining the sources above (Sears, PuroClean, Southern Living, EPA):
- Unplug the dishwasher or switch off its breaker (Southern Living).
- Wear gloves, eye protection, and a mask, and ventilate (PuroClean recommends an N95 respirator).
- Remove racks and the filter. Wash the filter in warm, soapy water; soakfor 10 to 15 minutes if grimy (Southern Living).
- Scrub the gasket, door edges, spray arms, drain, and corners with a soft brush, avoiding abrasive scrubbers that could damage the rubber (Southern Living).
- Use detergent and water first. The EPA says to scrub hard surfaces with detergent and water, then dry completely.
- Run a hot cycle with your chosen cleaner: a dishwasher cleaner as directed, or vinegar on the top rack.
- Optionally run a baking soda cycle separately (Whirlpool says never at the same time as vinegar).
- Wipe dry and leave the door ajar (Sears, Southern Living).
- Replace the gasket if stains or damage remain (Sears).
When Mold Keeps Coming Back
- Signs it needs more than a clean: spots return quickly, spread beyond the gasket, or there is standing water (Southern Living, which cites typical technician visits at $70 to $150).
- EPA threshold: mold under about 10 square feet can often be handled yourself. PuroClean (a restoration company with an interest in selling services) adds that hidden mold, leaks, or moisture reaching cabinets and flooring call for a professional.
- Prevention: keep the dishwasher dry, wipe the gasket, clean the filter monthly, scrape food off dishes, fix leaks promptly, and run hot cycles (Sears, PuroClean, Southern Living). The EPA‘s rule: “The key to mold control is moisture control.”
Real Buying Decisions
- Want a ready-made product: Affresh tablets are the clearest manufacturer-backed option, but check that you want a limescale and odor cleaner rather than a proven mold remover.
- Want the cheapest approach: white vinegar and baking soda, with Whirlpool‘s warning about frequent vinegar use. I did not find current prices for any product, so check them yourself.
- Have a stainless steel interior: avoid bleach unless your manual says otherwise.
- Have a sensitive or damaged gasket: replace it rather than keep scrubbing (Sears).
- Have health concerns or large growth: the EPA suggests professional help for about 10 square feet.
- Always check your manual before using bleach or any product not approved by the maker.
Frequently Asked Questions
What is the best dishwasher cleaner for mold?
No tested winner exists in the sources I read. A scrub plus a hot-cycle cleaner or vinegar is the common routine.
Does vinegar remove mold from a dishwasher?
Recommended by several sources, but not tested in anything I found.
Is it safe to use bleach in a dishwasher?
Only if your manual allows it, and never with vinegar. Avoid it on stainless interiors.
Is black mold in a dishwasher dangerous?
PuroClean says mold may affect indoor air quality and can trigger allergies or respiratory symptoms in some people.
Where does dishwasher mold grow?
Gaskets, filters, spray arms, drains, racks, and pooling water spots (PuroClean).
How do I clean the dishwasher gasket?
Equal parts white vinegar and warm water on the folds, then baking soda paste for stubborn spots
Can I mix baking soda and vinegar in the dishwasher?
Whirlpool says to run them separately, never at the same time.
When should I replace the gasket?
If stains or damage remain after cleaning (Sears).
When should I call a pro?
If mold returns, spreads, or there’s standing water or hidden moisture.
Conclusion
No source I found proves one dishwasher cleaner is best for mold. The reliable approach is to scrub the gasket, filter, and drain, dry the machine, and run a hot cycle with a dishwasher cleaner or white vinegar monthly. Keep the door ajar to dry the interior, check your manual before using bleach, and never mix bleach with vinegar. Persistent mold, leaks, or large growth call for a technician.