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First I tested out an old invisalign tray that had been soaking in Polident solution all day but, upon drying, still was kind of musty. I add a splash of mouthwash to the warm water and let it do its thing for 4 mins. The trays smelled great afterwards. I can't speak about removing the filmy look as my trays didn't have that.
Then I put it to the test with my rings. I added a few drops of dawn to warm water, set it to 4 mins and HOLY CRAP- they sparkled so much afterwards. My rings get so dingey looking and this made them look brand new! You can't really tell from the photos but, trust me, it did wonders on them.
Its small, unlike some other bulky ones i came across while comparing products, and the color and design looks great. It isn't loud at all, kind of a low hum. It actually sounds louder in the video than it does in person. It does warm up a bit but it didn't cause any warping of my invisalign trays because of it.
