Short answer: a manual brush is the cheapest option but misses plaque in grooves and clasps; an ultrasonic machine reaches those spots well but does nothing without the right solution in the tank; a liquid soak handles the chemistry a brush can't, and works with or without a machine. Most people end up using two of the three together: brush plus soak is the combination that actually covers both jobs.
Three methods, three different jobs
"Which false teeth cleaner should I buy" sounds like a single question with a single answer. It isn't. A brush, a machine and a solution aren't three competitors for the same job, they're three different jobs wearing the same marketing category. Buying one and expecting it to do what the other two do is how people end up disappointed with a perfectly good product, the way you'd be disappointed a toaster won't also do the washing up.
Manual brushing: cheap, honest, limited
A soft denture brush, used daily, physically dislodges food particles and surface plaque, no batteries, no tank, no instructions to lose. It's the cheapest method by a wide margin and the one every other method quietly assumes you're already doing, the way a gym assumes you own trainers.
What it can't do is the less flattering part: reach deep into clasps, grooves, or the microscopic surface texture where bacteria actually colonise. Brushing moves debris around. It doesn't disinfect anything, no matter how enthusiastically you do it.
Ultrasonic machines: all vibration, no opinion
An ultrasonic bath uses sound-wave vibration to shake debris loose from places a brush genuinely can't reach, into grooves, around clasps, across the whole surface at once, with the quiet confidence of a gadget that knows it looks good on a bathroom shelf. It's excellent at agitation and has absolutely no chemistry opinions of its own.
Run it with plain water and you've bought a very thorough, very expensive rinse, not a clean. The machine hums, the water sloshes, and the bacteria mostly shrug it off. The solution in the tank is doing the actual work, not the vibration.
Liquid soaks: the part doing the disinfecting
A dedicated liquid cleaner handles the part neither of the above can: actual bacterial reduction through chemistry, not agitation, and not good intentions. Blakmint's liquid cleaner was tested under ASTM E2315, the lab standard for measuring bacterial reduction on an appliance surface, against a mixed inoculum of four real bacteria strains: Pseudomonas aeruginosa, E coli, Staphylococcus aureus and E hirae. At a 20-minute soak, the result was a 99.99% reduction, the number printed on the bottle.
It works standalone, in a glass, doing nothing dramatic, or as the solution inside an ultrasonic tank, letting the machine take the credit for the vibration while the liquid quietly does the disinfecting.
Cost and faff, compared
| Method | Upfront cost | What it's missing alone |
|---|---|---|
| Manual brush | £6 (Blakmint Retainer Brush) | Deep-clean chemistry, disinfection |
| Ultrasonic machine | £15 to £40, one-off | Actual disinfection, needs a solution |
| Liquid cleaner | £14, up to 5 months | Mechanical agitation in tight grooves |
What none of these three fix
- A denture that doesn't fit properly. Cleaning method has nothing to do with fit; that's a dentist adjustment, not a gadget upgrade.
- Cracks or visible damage. No brush, machine or solution repairs a structural issue, however long you leave it soaking.
- Persistent soreness or smell despite a proper routine. Worth a dental check rather than escalating the cleaning method further.
Frequently asked
-
Do I need all three methods?
Not necessarily. Brush plus liquid soak covers both the mechanical and chemical side without needing a machine. An ultrasonic bath is a convenience upgrade, not a requirement. -
Is an ultrasonic machine worth buying?
If you've already got persistent buildup in grooves or clasps that brushing alone doesn't shift, yes, but it still needs the right solution in the tank to actually clean, not just agitate. -
Can I use any liquid in an ultrasonic machine?
No. Check the label states it's ultrasonic-safe. Not every tablet or liquid is formulated or tested for that use. -
What's the single best upgrade if I'm only changing one thing?
Adding a proper liquid soak to an existing brush-only routine closes the biggest gap: the chemistry a brush physically can't provide.
The Blakmint liquid cleaner is £14 for up to 5 months of use, persulfate free, ultrasonic-safe, and works standalone or in a machine.
Want the brand-ranking version instead? Read Best Denture Cleaner UK, or for the daily routine, How to Clean Dentures Properly.