Invisible ants who invade

It seems we have had an invasion of ants in the last few weeks or so. They are everywhere - all over the property, in the house but can't see them and in my car, even inside the groove of the trunk area.

They are buggers for sure. I brush off the bed before getting in it. Can't see the darned little things or feel them crawling on me but I can feel the after effects - the bites. I tried to sleep for over two hours only to feel the bites. I finally decided whatever, no sleep tonight. So decided to get up and blog about the stupid things.

I don't know what to do about them. I've tried sprays and powders and other poisons to get rid of them but without knowing where they are coming from, it is hard to get rid of them.