 covered inside and one of the air conditioning people said well the unit's history you're going to have to redo a bunch of stuff and I use a bio wash carefully not to get it on the connections and everything and had great luck getting rid of the ants orange oil in the past I've used and I've had some problems orange oil can actually create some problems in your electrical appliances talk more about that when I come back I'm Howard Garrett the Dirt Doctor back with you right after