It is a small, very fast white bug about 1cm in size. I can't see its antennae, but I'm not sure if I can't see them because the corners of the bathroom are white...
I used to see them only occasionally, but lately I've been seeing them frequently. I haven't seen them in the closet yet; they only appear in the bathroom. I bought insecticide and sprayed it down the drain, but it seems to have been ineffective as it was washed away by the water. I found them in the bathroom again just 4 hours after spraying the insecticide. Does anyone know how to get rid of this? I want to at least prevent them from breeding. There is no window in the bathroom, so there are limits to ventilation. I would be very grateful if you could help me...... (*using a translator)