So far, so good. I should have taken a before picture. It hasn’t become totally clear but it was rather stained over years of use. I feel better using my mouthguard knowing that it is being sanitized every day.

Once I was able to reread the manual and discovered I could run double cycles the slingers became noticeably cleaner. I now only need to run one cycle and the slingers are spotless and I am immensely comfortable using them daily. Thank you for this wonderful product.

I feel so much better using ZIMA than just brushing my teeth guards (night guards). I was always concerned about germs and getting sick from them, but this is such an easy way to make sure I am taking the best care of them possible - as well as taking care of myself!