Cleaning jewelry, eyeglasses, or retainers by hand never quite gets them clean. Toothbrushes scratch. Ultrasonic wipes leave streaks. And the grime that sits between the prongs of a ring or the nose pads of your glasses? It stays there.
That’s the gap an ultrasonic cleaner fills. The Magnasonic UC22 is one of the most approachable units on Amazon — a 20oz compact machine with 5 cleaning modes and a digital timer — and it’s become one of the most searched-for home cleaners in 2026.
Here’s what it actually does, where it works well, and whether it’s worth adding to your countertop.
Quick Take
View the Magnasonic UC22 on Amazon →
- Tank capacity: 20 oz (stainless steel)
- Cleaning modes: 5 preset cycles (90s / 180s / 300s / 480s / 600s)
- Frequency: 42,000 Hz ultrasonic waves
- Digital timer: Yes, with automatic shut-off
- Best for: Jewelry, eyeglasses, watches (non-waterproof removed), dentures, retainers, razors, small tools
- Price: Typically around $40
It’s the kind of product that sits quietly in a drawer until you realize how much cleaner your glasses could actually be.
How Ultrasonic Cleaning Works
Ultrasonic cleaners use high-frequency sound waves (42,000 Hz in the Magnasonic UC22) to create microscopic bubbles in water. These bubbles collapse against the surface of whatever you’re cleaning — a process called cavitation — which gently lifts dirt, oil, and buildup from crevices that brushes can’t reach.
The result: items come out cleaner than hand-washing ever achieves, without abrasion or scratching. No scrubbing, no chemicals required (though a drop of dish soap helps for stubborn grime).
What the UC22 Cleans Well
After researching real user reports and testing common household items, these are the clear wins:
- Eyeglasses — Gets behind nose pads and hinges where oil and sweat collect. Lenses come out noticeably clearer.
- Rings and earrings — Reaches the undersides of stones and between prong settings where skin oil and soap residue build up.
- Dentures and retainers — A safer, more thorough alternative to denture tablets alone.
- Razors — Cleans hair and soap residue from between blades, extending blade life.
- Watches (non-waterproof removed) — Cleans metal bracelets and links, including the hidden surfaces between pins.
- Small metal tools — Tweezers, nail clippers, fishing gear, small mechanical parts.
- Coins — Safely removes dirt without scratching collector coins.
What to Avoid
Ultrasonic cleaners aren’t for everything. Don’t put these in:
- Pearls, opals, turquoise, coral, or other porous/soft gemstones — Vibrations can damage or crack them
- Antique or fracture-filled gemstones — Cavitation can expand existing microfractures
- Watches with water-resistant ratings you can’t verify — The ultrasonic waves can damage movements
- Glued jewelry — The vibrations can loosen adhesive
- Electronics or battery-powered devices — Water + ultrasound is a bad combination
- Eyeglasses with anti-glare coatings showing peeling — Can accelerate coating damage
When in doubt, check with the item’s manufacturer or a jeweler first.
What We Like About the UC22
- Simple interface — Five preset modes and a digital display. No complicated controls.
- Compact size — Fits easily on a bathroom counter or in a drawer
- 20oz tank — Big enough for most personal items, including eyeglasses lying flat
- Stainless steel tank — Easy to clean, resists corrosion
- Automatic shut-off — Timer ends the cycle without supervision
- Quiet operation — Produces a soft hum rather than a loud motor sound
- Affordable entry point — Under $50 for a capable cleaner
What Could Be Better
- 20oz is personal-scale — If you want to clean larger items (multiple watches, larger dental appliances), you may want a 27oz+ unit
- No heater — Higher-end cleaners warm the water for more effective cleaning of heavily soiled items
- Not meant for industrial use — Jewelry studios and shops will need a larger, higher-wattage professional unit
These aren’t deal-breakers for home use — they’re just reminders that this is a countertop consumer product, not a professional workshop machine.
How to Use It for Best Results
- Fill the tank with warm tap water to the fill line
- Add a drop or two of dish soap (optional but helpful) — avoid harsh chemicals
- Place items in the tank — don’t overcrowd; items should have space to vibrate
- Select a cycle based on how dirty the item is (90s is usually enough for eyeglasses; 480-600s for heavy jewelry grime)
- Rinse items under running water after the cycle
- Pat dry with a soft cloth — don’t rub
For deep cleaning, you can run two cycles back-to-back. For most everyday cleaning, a single 180-second cycle does the job.
Who Should Buy the Magnasonic UC22?
The UC22 is a great pick if you:
- Wear glasses daily and want them actually clean (not just wiped)
- Have a jewelry collection you wear regularly and want to maintain
- Use retainers, aligners, or dentures and want a more effective cleaning routine
- Want a low-commitment, under-$50 ultrasonic cleaner for general household use
It’s probably not the right pick if you:
- Run a jewelry repair business (look at larger, commercial-grade units)
- Want to clean large items like carburetors or big machinery parts (need a bigger tank)
- Already own a higher-capacity ultrasonic cleaner that’s working fine
Bottom Line
The Magnasonic UC22 is the kind of small appliance that overdelivers on its price. For around $40, you get a properly engineered 20oz ultrasonic cleaner with 5 preset modes and a digital timer — enough to handle everyday jewelry, eyewear, and small personal items with noticeably better results than hand-cleaning.
If you’ve been curious about ultrasonic cleaning but didn’t want to commit to a bigger or pricier unit, this is the low-risk way to try it out.