This is odd....last year we had a fairly wet spring. In late May I went into the basement one day and had a bunch of fleas land on me. I dropped a bug bomb in there a couple of times but they still returned. I tried some power, that didn't touch them at all. I sprayed a bit of cedar spray on the stairs into the basement which stopped them from hanging out there. The basement is fairly wide open and there are no warm/wet areas for them to call home. I have a cat but she's an outdoor cat that only comes in during the winter. No mice or rats down there. They returned again this year, I just avoided the basement and would enter through the back exterior door to get the mower out.
What's the best way to get rid of them for good? This year I spray some cedar scented spray at the bottom of the door, inside a few feet then along the window to make sure they weren't getting in from there. They didn't bite when they landed on me....I've heard there are "concrete" or "basement" fleas but I wasn't sure if they'd come and go or not. This is pretty bizarre.