This can be purchased at a feed store or online. Get the puffer. Shoot this into every crack and cranny you have. It makes any insect dry up and die - even fleas.
Some people ingest it to lower cholesterol, internal insecticide, improves skin and hair appearance (collagen), removes toxins and heavy metals. Absorbing toxins in the gut improves gut health.
How to consume it is up to you. Research it and decide for yourself. It’s suggested to take a spoonful a day in water on an empty stomach and not while other meds are in your system being absorbed.
Some make a paste to rub on the skin.