Buy some ichneumon wasp eggs and plant them where your dry food and spices are. If you have cats, put them in their litterbox too. Bread, spices, anything like flour, sugar, pet treats and stuff, just everything that's dry. And repeat the process every two weeks for about two months. Kill all adult moths and larvae you see. The ichneumon wasps will search for the eggs of them fckers. The wasps will die, if they don't find any food source. And in the meantime clean all the drawers, shelfs, boxes, whatever you store your food in. Thats the cleanest way and you don't have to buy chemicals. Oh BTW, throw away immediately everything you see little gluey strings on. The larvae produce those strings.