How does an ultrasonic cleaner work?

It uses high-frequency sound waves in water to create tiny bubbles. These bubbles rapidly collapse, producing a scrubbing effect that removes dirt from the surface of items—especially from small gaps and hard-to-reach areas.

Do I need to add cleaning solution when using it?

For regular cleaning, plain water is sufficient. For stubborn dirt (such as oil stains or oxidation), you may add 1–2 drops of neutral detergent (e.g. dish soap).

Why does cleaning glasses or jewelry seem ineffective?

Please make sure of the following:

Use neutral detergent (e.g. dish soap) to boost results;

Fully submerge the items in water;

Try a longer cleaning cycle;

Manually wipe stubborn stains (such as oxidation).