
What is this..? Mold? Dust? Read description
Just came across this in ceiling of my spare bathroom. (No shower just a toilet) has these greyish specks on the ceiling. US-PA.
The weird thing is I can literally wipe them away with a dry papertowel and they disappear. Do you think it’s mold? Dust? Spider tracks? What the heck is it..? No signs of water damage either. Really weird