The latest comic from Randall Munroe at xkcd is funny, due to the ignorance about how homeowner’s insurance works. But the concept of shining a blacklight on your bathroom is a new one on me. Do we dare try it? Some people clean their toilets on a regular schedule, while others only clean it when it looks dirty. Urine glows under a UV light, which this page recommends for finding pet stains on a carpet. That seems like a good idea. But they also mention using a blacklight to see how clean your hotel room is …and that can be frightening. There are some things it’s just better to not know.
If you are really worried, there are are a number of good products that dissolve biologicals in mere minutes. Message me, I can even tell you how to find the best, most residue free, cost free solution in any major American city.