Clean the area with a bleach and water solution and then you can spray with Sevin, which is a product you can buy at a garden store.
Yes. They are made from the oils or something in the seed of the chrysanthemum. I know they have many pyrethrin based insecticides on the market, and most of us use them with our birds, but for inside the house, they can be toxic and caue problems. It can be bad for humans and other pets, and especially fish, if you have fish tanks. For inside, I would use the seven dust, that Charis has suggested. I was breeding mealworms a while back, and got mites in the house, in the room where I kept the worms. This can happen, as the sometimes come in on the chicken mash that I used as bedding for the worms. I used the sevin dust, as recomended to me by a friend who raises chickens. It worked great. I'd use that in the house. Sprinkle on the carpet where they are getting in. The spray or the dust both work. It's just that I normally use the dust.You can try those insecticides that contains pyrethrin, an organic based insecticides produced by a flower. Just read the label. Please describe the insects look.