It’s revolting. Whenever I rinse my mouth, scores..sometimes hundreds of tiny creatures pepper my sink. They are not”miniscule”, as they are referred to. The largest is over 1/8” long. They are colored black, brown, cream, orange and green. Rinsing with hydrogen peroxide or alcohol gets rid of them...but only for a few hours. I’m 90 years old and having difficulty coping. Is this a common problem?