do blood urine and semen need to be dry in order for them to glow under a blacklight?

i have a blacklight and also ordered a pair of orange goggles that are supposed to make blood urine and semen more visible i was wondering if they need to be dry in order to se them?
Tags: blacklight, Blood, glow, need, order, semen, them, under, urine
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Do an experiment and have fun on your sheets