I had small flying black bugs in my bathroom also. They were all on my walls, in my magazines, in my paper towels and tissue. Had no idea where these thongs were coming from. One day, I figured, maybe they are coming from sewer (at night from bottom of floor by commode) and grabbed the RidX box off of shelf above commode to pour down the bowl..bugs were coming out of RidX box FALLING INTO COMMODE with RidX!!! Falling and crawling on my arm!! I hollered!! Then put box in 2 WalMart bags and walked that bag OUT TO MY TRASH CAN. Shopvac my floor and cleaned bathroom, NO MORE BUGS!!! I’d never heard of such a thing. Freaked me OUT.