I made a pvc feeder out of 3" pipe. I keep finding bugs in the food. I never see any in the bucket that stores the food, but one day after putting food in the feeder, it is filled with bugs, even though I disassembled it and washed it all out the day before. I also have little cups that I fill with food inside the coop. I found some bugs in that before I cleaned everything, but the cup doesn't have bugs in it today. The bugs are all small black things. Not roaches or ants, but I don't know what they are. How do I stop this? I'm wasting tons of food, and have gotten to the point of only putting a small amount of food in the pvc feeder at a time. That kind of defeats the purpose of the pvc feeder though, and is not helpful when we travel.