And now a word from our sponsor. Do we have a sponsor? Anyhow. When I
bring home anything that I think critters may be lurking inside: first I
freeze it for a few days. When it's allowed in the pantry, somehow... no
idea why... the sticks of Wrigley's Spearmint gum randomly tossed on the
shelves seem to either kill them or discourage their intentions.
Meanwhile, back to the op, buying in bulk and having to dispose of part
of it because of infestation just ain't no bargain. Polly