Key Takeaways
- Deepest cut in the pool: The Newelkin ultrasonic retainer cleaner runs 45kHz with a UV light and an IPX7 waterproof rating, and it is sitting at 60% off with a limited time tag.
- Machine or tablets: The Weiss Naturals retainer tablets are persulfate free and ship as a 240 count, which is the cheaper path if you are not ready to buy hardware.
- Cordless option: The 7MAGIC cordless cleaner holds 200 ml and runs at 48kHz, so it works on a countertop without hunting for an outlet.
- Cleanser pricing is soft right now: CeraVe, Cetaphil, and e.l.f. are all marked down, several of them sold directly by the retailer rather than a third party seller.
September is when the drawer stuff comes back out. The retainer case that got shoved behind the sunscreen in June, the night guard you stopped wearing in July because the room was too hot to sleep in anyway, the six month dental appointment that always seems to land in the fall. And then you open the case and remember why you stopped.
Reviewing this week’s beauty deals, the word “clean” pulled an odd mix. Two ultrasonic retainer cleaners showed up discounted at the same time, which almost never happens, next to a wall of facial cleansers from the big drugstore names. The Newelkin machine is the one that made me stop scrolling, because a 45kHz unit with a UV light and an IPX7 rating at this price is not the usual story.
So this Berry Basket leans into two kinds of cleaning: the appliance that gets biofilm off a plastic aligner, and the everyday face washing that goes with the same bathroom shelf. Prices verified September 16, 2026.
Which ultrasonic cleaner works best for retainers and night guards?
For most people, a 45kHz to 48kHz tabletop unit with a basket is the right call, and either of the two machines below covers that. Ultrasonic cleaning works by cavitation, meaning the water itself does the scrubbing in places a brush cannot reach. That is the whole point with a clear aligner or a thermoplastic night guard, where the surface is full of micro texture that holds odor.
Newelkin Ultrasonic Retainer Cleaner
This is the pick I would point a friend toward. The 45kHz frequency sits in the sweet spot for soft plastics, the UV light handles what the cavitation misses, and the IPX7 rating means a splash near the sink is not a problem. Its bestseller rank is high enough that this is a proven unit rather than a new listing chasing a launch bump, and the 60% markdown is the deepest in this week’s beauty pool.
- 45kHz ultrasonic frequency
- UV light
- IPX7 waterproof rating
7MAGIC Cordless Ultrasonic Cleaner
The cordless build is the real argument here. A 200 ml tank is small, which is fine for a retainer or a night guard and wrong for jewelry batches, and 48kHz is a slightly higher frequency than the Newelkin. It costs more, so buy this one if outlet placement in your bathroom is genuinely annoying, not for the extra 3kHz.
- Cordless operation
- 48kHz frequency
- 200 ml tank capacity
B. WEISS Retainer Cleaner Tablets
Tablets are the low commitment version of this whole category, and this one is persulfate free, which matters if you have had mouth irritation from cheaper denture tablets. A 240 count works out to roughly an eight month supply at daily use. They are grape scented, which is a strange choice for an adult product, though nobody has to smell it but you.
- 240 tablets, 8 month supply
- Persulfate free formula
- Works on retainers, night guards, and dentures
Conair Interplak Brush Heads

Interplak by Conair OptiClean Replacement Power Plaque Remover Brush Heads, Color May Vary
Replacement heads for the Interplak plaque remover, and the kind of thing people forget exists until the bristles splay. Conair keeps these cheap on purpose, and the color varies by shipment, so do not order expecting a specific one. If you are already deep in a bathroom restock, this is a sensible add, the same way a sensitive skin electric razor ends up in the same cart as the toothbrush heads.
- OptiClean replacement power brush heads
- Fits Interplak plaque remover
- Color may vary by shipment
Which face cleansers are worth grabbing this week?
Four trusted names landed at half off or close to it, and most are shipped by the retailer rather than a marketplace seller, which lowers the counterfeit risk that plagues skincare listings. Fall is also when people switch formulas, since the gel wash that felt right in August starts stripping once the heat comes on.
CeraVe Hydrating Cleanser
The 16 ounce bottle is the size worth buying, because the small one disappears in six weeks and costs nearly as much per ounce. Hyaluronic acid plus ceramides means it does not squeak your skin dry, which is the whole reason dermatologists keep naming it. If you are about to start a retinoid this fall, a non foaming wash like this pairs better than anything with acid in it.
- 16 oz bottle
- Hyaluronic acid formula
- Non foaming, made for dry skin
Cetaphil Daily Facial Cleanser
The oily and combination version of Cetaphil’s daily cleanser, which is the one to pick if the classic Gentle Skin Cleanser has always felt too slick on you. It is a low drama formula with no fragrance story attached, and the 16 ounce bottle lasts a long time. Fine rather than exciting, and sometimes that is exactly what a bathroom needs.
- 16 oz bottle
- For oily and combination skin
- Fragrance free daily formula
e.l.f. Clarifying Cleanser
A 1% salicylic acid gel cleanser at a price where testing it costs nothing. Salicylic acid in a wash has limited contact time, so treat this as maintenance for congested pores rather than a fix for real breakouts. It also removes makeup, which makes it a decent single step option on lazy nights.
- 1% salicylic acid
- Gel cleanser
- Removes makeup and controls oil
Burt's Bees Gel Cleanser
Aloe, glycerin, and cucumber extract in a gel base, aimed at normal to combination skin and marked safe for sensitive skin. Burt’s Bees does not usually discount new formulas this quickly, so the limited time tag on a recent release caught my eye. Worth a look if fragranced cleansers have been making your cheeks feel tight.
- 8 fl oz
- Aloe, glycerin, and cucumber extract
- Safe for sensitive skin
What is the best way to take makeup off at night?
Oil or balm first, then your regular cleanser. That order removes sunscreen and long wear makeup far better than a single water based wash, and it is gentler than scrubbing. If eye makeup is the part you dread, the same logic applies as with any lash product for sensitive eyes: less friction, more dissolving.
ma:nyo Pure Cleansing Oil
ma:nyo’s Pure Cleansing Oil has held a top bestseller position in its category for years, which is unusual for a K beauty product that came in on hype. It emulsifies properly, meaning it rinses clean instead of leaving a film, and the 6.76 ounce bottle is a reasonable size for nightly use. This is the one I would grab off this list.
- 6.76 fl oz
- Emulsifies for clean rinse
- Blackhead and pore care
Real Techniques Cleansing Balm

Real Techniques Real Clean Face Erase Makeup Removing Balm, Cleansing Balm
A balm instead of an oil, which travels better because nothing leaks in a bag. Real Techniques prices this well below the boutique balms that do the same job, and it handles heavier base makeup without much rubbing. If you wear a fragrance free foundation because your skin reacts to everything, check the ingredient list on this before committing, since balms are usually scented.
- Makeup removing balm
- Solid format, travel friendly
- Face Erase formula
Garnier Micellar Water
The two pack is where micellar water makes sense, because a single bottle at full price is poor value for what is mostly water and surfactant. The hyaluronic acid version is a bit more comfortable on dry skin than the original blue cap. Use it for a quick first pass, not as your only cleansing step.
- 2 pack, 13.5 fl oz each
- With hyaluronic acid
- Vegan and cruelty free
Frequently asked questions
Do ultrasonic cleaners really clean retainers and night guards?
Yes, for the part brushing cannot reach. The transducer creates microscopic bubbles in the water that collapse against the surface and lift buildup out of the texture of the plastic. It does not sterilize on its own, which is why models with a UV light or a cleaning tablet in the water do a more complete job.
What kHz should I look for in a retainer cleaner?
Somewhere between 42kHz and 48kHz is standard for dental appliances. Lower frequencies produce larger, more aggressive bubbles suited to metal parts, and higher frequencies are gentler and better for soft thermoplastic. The Newelkin at 45kHz and the 7MAGIC at 48kHz both sit in the safe range.
Can I just use tablets instead of buying a machine?
You can, and for a lot of people that is enough. Tablets dissolve stains and cut odor while the appliance soaks, though they do not dislodge buildup from grooves the way cavitation does. Many owners use both, dropping a tablet into the ultrasonic bath once or twice a week.
Can I clean a night guard with boiling water or in the dishwasher?
No. Night guards and clear aligners are thermoplastic, and heat warps them permanently, which ruins the fit and can cost you a replacement from your dentist. Use room temperature or lukewarm water only, whether you are soaking or running an ultrasonic cycle.
How often should I run a cleaning cycle?
Rinse after every wear, and run a full cleaning cycle a few times a week at minimum. If the appliance has started to smell or look cloudy, that is biofilm, and it needs more frequent attention than you have been giving it.
Discounts this week ran from 29% at the shallow end up to 63%, with the steepest cuts clustered on the cleaning hardware rather than the skincare. That is a flip from the usual pattern, where drugstore cleansers carry the deep markdowns and appliances hold firm. The CeraVe and Cetaphil prices are solid without being remarkable, roughly where they land during any normal promotional week, and the original prices on both look honest rather than inflated.
The standout is the Newelkin ultrasonic cleaner. A 45kHz unit with UV and a waterproof rating at 60% off is a real deal, not a listing that quietly doubled its list price last month, and its bestseller rank backs up that people are buying and keeping it. The 7MAGIC is good hardware and I would still take the Newelkin unless cordless matters to you. Among the cleansers, the ma:nyo oil is the one with a track record long enough to trust, while the Burt’s Bees gel is promising but too new to have a real review history behind it.
Watch the ultrasonic category over the next few weeks. Two units discounting at once usually signals inventory clearing ahead of the holiday gift wave, when these get repackaged as stocking fillers at full price. If you have been meaning to replace a grim retainer case setup, this is the window. More cleansers and cold weather skincare are landing on the shelf as the season turns, and you can browse all deals if you would rather sort through the pool yourself. Anyone starting a fall routine reset should also read up on beginner friendly retinol serums before pairing an acid wash with anything new, and if heat styling is part of your morning, heat protectant for color treated hair is the cheapest insurance in the bathroom.








