Hi Grace,
It is never a good look when you are able to see toothpaste smears and other nasty stuff on a person’s bathroom mirror as they take a selfie in front of it.
Selfies in front of bathroom mirrors are not appropriate pics for a dating site profile regardless of whether the person has a clean mirror or not.
The majority of people that post selfies in front of bathroom mirrors are often met with a lack of matches. Potential dating prospects experience their own bouts of disgust at the sight of said mirrors and choose to bypass the culprit’s dating profile.
Maybe that is what it takes to get them to stop posting them. One can only hope.