Hi, I've run into a bit of an emergency with my cats. I caught one of them peeing on the basement wall last night. I think I had a problem with water coming into that area causing the lime mortar to smell like ammonia (common apparently), but I can't be sure it wasn't the cats all along. Now trying to do urgent cleanup and possibly get the wall re-parged. The walls and floor are so ancient and stained, I can't tell what might be cat pee and what's just from old age.
Can anyone recommend a blacklight that actually works for pet stains? All the ones I've looked at on Amazon have reviews from people saying they don't pick up the urine.