MarketplaceScope Whitening MouthwashPosted on January 20, 2010. Can bleach mouthwash bad for teeth? My mother seems to think its bad because she thinks it will wear on my email as whitening strips do ... mouthwash is not bad as long as its alcoholic Im pretty sure its not bad. Dentists tell you to use it like 3 times a day every day. it's not like keep your heart in your mouth like whitening strips. I think that your teeth will be good =] no worries CommentsThere are no comments.Leave a Comment | Popular My Friends |