OK, after I spayed this flea/tick/mite stuff on my mattress ( it was really supposed to be sprayed on the animal which irs my cat but I knew she wouldn't stand for that) I noticed these black smudges on my sheets, none on my mattress, and some smudges were even on some shirts that I had left on the bed. I did not see this until I sprayed that stuff on the bed. What in the world could this be? I am so afraid of somehow getting bed bugs, the room is not messy at all. We have a dog and a cat, inside cat and outside dog. Please any tips or solutions/explanation will help! Last thing, I saw 2 brown spots on the mattress where my cat lays, just 2, and they were not on the sheets.