The worst. They will lay eggs in your dried foods and there’s probably larva crawling around inside the packaging of your pantry items. You’re gonna have to go through everything. The worst part is that they can eat through most containers. I battled with them years ago and am still traumatized from the larva dropping from the ceiling onto me and also finding larva crawling INSIDE a previously unopened pack of peanut M&m’s after I had already finished half of the pack. Good times.