$3 Sounds like pantry moths. They don't need much at all to survive on. If you've ever eaten in the car, a few particles of flour is all it takes. Since you need a male and female to propagate the species in your biosphere, you might try using a pheromone trap. These are available at your home improvement stores. I think they are about $6 for 2. It will trap the male or female...don't remember which. You also might take your car in for a detail. Get the carpets cleaned and completely vacuumed.