I had my Foreo Luna Sonic Face Brush for few years already and even tho I clean it after every use, it had some stubborn stains (mostly hard water stains) that wouldn't go away! I finally decided to test out few different methods of cleaning the brush, like washing it with vinegar, scrubbing with baking soda, washing it in a dishwasher. And after nothing worked I decided to try denture cleanser tablets! Here are my results! Was it worth it?