Anonying Tiny Insect

Starting from Friday morning, I found some tiny tiny sections start showing up in my restroom. At first it was just a few, but slowly their quality started to increase. So a while ago I finally couldn't stand it. So I packed my toothbrush and such, and then I sprayed around the restroom with insect killer spray. Let's see if the problem got resolved once and for all by the time I wake up tomorrow morning.