- Shows things that you cannot see
- Lots of false negatives, at least in my opinion
- Clean water and cleanser is splashed on wall, it will show a false positive
I have used several different solutions to remove dog urine. I believe it has lots of false negatives because after using baking soda & vinegar to clean the carpets I still see the same spots showing up but now they are bigger. I have also bought Bissell carpet cleaner pet solution with oxy additive and had the same results. I do not know if this is normal or if it is proving that none of the cleansers actually work.
DISCLAIMER: I received UV flashlight for free in exchange for giving my honest opinion. I do not have a relationship with the seller and manufacturer of this product.