After I read your comment, it occurred to me to read about bacterial films. This is the Wikipedia article: https://en.m.wikipedia.org/wiki/Biofilm https://en.m.

After I read your comment, it occurred to me to read about bacterial films. This is the Wikipedia article: https://en.m.wikipedia.org/wiki/Biofilm https://en.m.wikipedia.org/wiki/Biofilm If you don't mind spending a few dollars, flavored tooth soaps are carried by most natural food stores.