It could be obscure ways to determine head lice and nits, as They might look unique from when they're out with the hair. Found close to the hair shafts, when pulled out from the hair it is simple to recognize what do nits look like on the white paper towel. https://what-lice-eggs-look-like44433.snack-blog.com/31409989/the-can-you-see-lice-in-blondes-diaries