In the past month I have noticed black specks accumulating at the inside edge of our bathub. I rinse them off after showering but they return in 1-2 days. I attached pics below. Any idea what the cause is?
I am having the same thing looks just like picture.. and is in front corner of tub by the faucet and shower head side. Anyone have any idea what they are?
I also keep sweeping them up and in a couple days they return.
