Review on Fresh Guard Specially Formulated Mouthguards by Monique Ahn

I need to use a persulfate free product and it is one of the few products available. I prefer non-persulfate cleaners in dissolving tablet form, but they don't seem to be available anymore. So I replaced this granular shape. Here are the cons: I often find it difficult to open small packages, so I have to use scissors and it often spills on the counter. Also, the product doesn't clean as well as my old tablet cleaners. It would also be handy if the shell could stay in solution for longer than 15 minutes. But at least I'm not allergic to it!