

The only thing I ever had were food moths, after leaving an open container of flour out and putting it away after a day. It was pretty disgusting having their larvae crawling around, but luckily there are parasitic wasps you can order that kill their eggs (they look like tiny specks of dust, not normal wasps).
Sounds scary, but it was literally tiny specks of dust that moved in my pantry. Nothing that was identifiable as an insect. And after the moths died out, they also died out by themselves.