Hi all, Can anyone tell me if semen stains would definitely glow under a black light (UV light) ? I've been told that they would glow in greenish-yellow under the UV light. But later on someone said semen stains cannot glow without a substance called 'luminol'. Which one is true??? And if the semen stains were stuck on a bed sheet like 5 months ago,(being slept on but never been washed), is it possible that the semen substances still remain on it? Would the scrubbing or fiction makes them totally coming off or disappear? Thanks in advance!