At first I thought they are plain moths, until I noticed some larvae climbing towards the ceiling, always in the kitchen. I made an inventory and discovered a package of hazelnuts which contained more larvae and excrement than hazelnuts. I threw away all open nuts, grains, flour and chocolate packages I had, and started keeping all of them in tightly closed containers after opening. I also placed a pheromone trap in the kitchen.
But I am still seeing them, both larvae and adults, weeks after the big throw-away-day. I went again through the pantry, but this time, I didn't find contaminated food, just a few larvae outside of food containers. Periodically throwing the stuff away is too expensive, and it makes no sense if it doesn't get rid of them. Any idea how to remove the infestation? Also, are they just unpleasant, or can they present a health risk (e. g. as carriers of microorganisms which infect the food)?