Hi there - sorry to hear about your pine nuts. Can I help with some advice and information about moth damage in the kitchen, which may well be the cause of your problem. Other signs that may suggest food moth activity are maggots in kitchens or on kitchen walls and ceilings. These maggots are actually the larval stage of kitchen moths. 

Here are some tips on how to get rid of food moths for good:

1. REMOVE - Remove your food from the affected drawers or cupboards and vacuum really thoroughly paying attention to edges, cracks and crevices inside and out.

2. CLEAN - Thoroughly clean all surfaces that may be affected and leave to dry. Discard any infested foodstuffs away from your house.

3. KILL - Spray the affected storage unit to kill any eggs and / or larvae

4. MONITOR / PREVENT - Place moth traps close to affected areas to monitor for adult moths and to break the breeding cycle

5. REFRESH - Keep moth traps current and replace every 3 months –  with warmer houses food moth damage and infestations are now a year-round problem, and moth prevention is better than cure.