How to Whiten Dentures: Safe Stain Removal That Won't Damage Them

Quick answer: To whiten dentures, you remove the surface stains rather than bleach the material. Brush them twice a day with a soft brush and soap or a non-abrasive denture cleanser, soak them daily in a denture cleaning solution, and rinse well. Never use bleach, hot water or whitening toothpaste. For stubborn stains, ask your dental team.

Why listen to us? Blakmint's liquid cleaner was tested under ASTM E2315 against Pseudomonas aeruginosa, E coli, Staphylococcus aureus and E hirae, with a 99.99% reduction at a 20-minute soak for the sample tested. Every piece of care advice below comes from NHS, Oral Health Foundation and Mayo Clinic guidance, linked as we go.

Can you actually whiten dentures?

Here's the honest bit, delivered gently: you can't whiten dentures the way you'd whiten natural teeth. What you can do is get rid of the stains sitting on them, which is where most of the "they used to be whiter" feeling comes from. It's less a makeover and more a very thorough wash, like finding out your white trainers were white all along under the mud.

Mayo Clinic's denture care advice says whitening toothpaste "often contains peroxide that does little to change the color of denture teeth." So the tube with the dazzling smile on the box isn't the shortcut it looks like. I've been fooled by packaging before. I once bought a "self-cleaning" water bottle and it turned out the "self" was me.

If the shade of your denture teeth themselves is what bothers you, rather than surface staining, that's a conversation for your dentist. No soak or brush changes the colour the teeth were made in.

What stains dentures in the first place?

An NHS community dental service leaflet puts it plainly: "Like natural teeth, dentures get stained by food and drink, and smoking." So yes, your morning cuppa is in the line-up of usual suspects. I'm not saying give it up. I'd sooner give up a kidney than my second brew of the day.

Tea in particular has form. A 2024 laboratory study in the Journal of Clinical and Diagnostic Research (Agrawal et al.) tested two denture base resins and found that "Tea showed a higher staining than coffee." That was an in-vitro test on resin samples, not on people's mouths, but it backs up what anyone who owns a white mug already suspects.

The good news from the same NHS leaflet: "In most cases you should be able to remove this staining with regular cleaning." Which means the fix is mostly routine, not a heroic weekend project. My kind of fix.

How to whiten dentures safely: the stain removal routine

This is the routine from the NHS leaflet, the Oral Health Foundation's denture guidelines and Mayo Clinic. None of it is glamorous. All of it works better than staring at the stain and hoping it gets embarrassed and leaves.

1. Brush twice a day. The NHS leaflet says to clean dentures twice a day with a small-headed toothbrush with medium bristles, or a denture brush, covering every surface, including the parts that sit against your gums.
2. Use soap or denture cleaner on the brush, not toothpaste. The leaflet says to put "denture cleaning solution or soap on your brush, not toothpaste, as some toothpastes can scratch your dentures." The Oral Health Foundation guidelines also specify a non-abrasive denture cleanser with no toothpaste.
3. Soak every day. The NHS leaflet says to "Soak your dentures every day in a denture cleaning solution to help remove plaque and stains." Follow the soak time on your product.
4. Rinse thoroughly. Mayo Clinic advises rinsing dentures well before putting them back in, especially after a soaking solution.
5. Rinse after meals. Mayo Clinic suggests running water over dentures after eating to remove food debris. A quick rinse after that cup of tea gives stains less time to settle in.
6. Work over a soft landing. The NHS leaflet suggests holding dentures over a bowl of water or a folded towel while you clean them, in case they slip. Wet dentures are slippery. So are wet bars of soap, and I've lost more of those down the plughole than I care to count.

What not to use: the stain "fixes" that damage dentures

When a stain won't shift, the cleaning cupboard starts looking very tempting. Please close the cupboard. I say this as someone who once tried to remove a coffee ring from a table with a scouring pad and now owns a table with a matte patch.

• Bleach. The NHS leaflet says "It is important not to use any type of bleaching product to clean your dentures" and that "Bleaching can lead to weakening of the dentures as well as staining them." Mayo Clinic agrees bleach can weaken dentures and change their colour. So the very thing people reach for to whiten can make the colour worse.
• Hot or boiling water. The NHS leaflet says "Do not use very hot water to soak your dentures" because it can weaken them and cause them to break. Mayo Clinic gives the same advice.
• Ordinary toothpaste. The NHS dentures page says not to clean dentures with toothpaste, because it could damage them. Scratches also give future stains somewhere new to move into.
• Whitening toothpaste. As above, Mayo Clinic notes its peroxide does little to change the colour of denture teeth.
• Stiff brushes and harsh cleansers. Mayo Clinic says not to use stiff-bristled brushes, strong cleansers or harsh toothpaste.
• Anything on metal parts you haven't checked. The NHS leaflet notes some cleaning products can damage metal dentures, so ask your dental team how to clean yours if it has a metal framework or clasps.

Sources: NHS Oxfordshire Community Dental Service, NHS, Oral Health Foundation, Mayo Clinic, checked November 2026.

When stains won't budge

Sometimes a stain has simply moved in, unpacked and put its feet up. The NHS leaflet says "Stubborn stains may take a little more cleaning which your dental team should be able to help with." That's the safe route, and it beats an evening of escalating kitchen experiments.

The Oral Health Foundation guidelines also recommend that denture wearers stay in a regular recall and maintenance programme with their dental professional. So your next check-up is a perfectly good moment to point at the stain and say "this one, please." I find pointing very effective. It's how I order at most restaurants.

Where a liquid denture cleaner fits in

The daily soak is the step a denture cleaning solution covers, and Blakmint's Liquid Retainer & Denture Cleaner is one option for it. You mix 10ml of cleaner with 90ml of lukewarm water, soak for 5 to 20 minutes, then brush and rinse. The mixed solution can be reused for up to 6 days, which is how one £14 bottle of 250ml lasts up to 5 months. It's the only thing in my house that lasts five months without me forgetting about it.

Our product page states it "Helps loosen tartar build up on dentures when soaked, then brushed." It's persulfate free and stated as compatible with ultrasonic cleaners. It isn't a whitener, and it won't change the shade your denture teeth were made in: it's there for the cleaning step, alongside the brushing. Keep routine soaks to the 5 to 20 minute window, with an overnight soak only occasionally.

And there's no single "proven best" method to stress about. The Cochrane review of denture cleaning methods found a lack of evidence about the comparative effectiveness of different cleaning methods. Brush, soak, rinse, repeat. If tablets suit you, they do the same soaking job.

Frequently asked questions

1. How can I whiten my dentures at home?
   By removing surface stains. Brush twice a day with a soft brush and soap or a non-abrasive denture cleanser, soak daily in a denture cleaning solution and rinse thoroughly. The NHS says most staining can be removed with regular cleaning. Cleaning does not change the shade of the denture teeth.
2. Can I use bleach to whiten dentures?
   No. NHS guidance says not to use any type of bleaching product on dentures, because bleaching can weaken them and stain them. Mayo Clinic gives the same advice.
3. Does whitening toothpaste work on dentures?
   Mayo Clinic says whitening toothpaste often contains peroxide that does little to change the colour of denture teeth. The NHS advises against cleaning dentures with toothpaste, as it can damage them.
4. What causes dentures to stain?
   The NHS says dentures get stained by food and drink, and smoking. A 2024 laboratory study on denture base resins found tea stained them more than coffee.
5. What if the stains don't come off?
   Speak to your dental team. The NHS says they should be able to help with stubborn stains.

Ready to make the daily soak easy?

Clean dentures look their best, and the routine is what keeps them that way. If you'd like a persulfate free, reusable soak, the Blakmint Liquid Retainer & Denture Cleaner is £14 for a 250ml bottle that lasts up to 5 months. It's stated as compatible with ultrasonic cleaners and works for dentures, partial dentures, retainers, night guards and mouthguards.

Want the full care basics? Read How to Clean Dentures Properly (Without Wrecking Them). Using tablets for your soak? Our practical guide to denture tablets covers what's in them and how to use them.