Review on NVTED UV Ultraviolet Flashlight Blacklight: Powerful 51 LED 395 nM Handheld Portable Pet Urine & Stain Detector by Michael Lucas

This light can give false alarms from soapy water but is VERY good at detecting biological residue. I have to recommend this product to housekeepers EVERYWHERE. Much better than the old neon lights I ALWAYS carried to inspect every hotel room before unpacking my bags. You should have seen the face of a hotel manager when he asked for new pillowcases because of obscene filth. Many hotels felt flattered when I complimented them with excellent cleanliness.