They do nest in the cracks between the shelf and the wall, under shelf paper, and even between the pages of cookbooks.
We have had some moderate success with the traps, plus storing big bags of rice and flour in picnic coolers and everything else in airtight containers, but they have to be really airtight -- those little buggers can get under the lid of a mason jar or the tops of a canister set. What happens now is like a lesson in public health and contagion: one container will occasionally get a mess of webs and moths, but the scope is limited.
We have had some moderate success with the traps, plus storing big bags of rice and flour in picnic coolers and everything else in airtight containers, but they have to be really airtight -- those little buggers can get under the lid of a mason jar or the tops of a canister set. What happens now is like a lesson in public health and contagion: one container will occasionally get a mess of webs and moths, but the scope is limited.