My car's windshield wiper fluid reservoir had a leak and quite a bit of it soaked into my garage floor (which is a light concrete). It happened over night, so it soaked quite a bit. Now the floor is stained blue!
I've tried using this concrete cleaner from Home Depot combined with veracious scrubbing with a hard bristle brush but to no avail:
I also tried bleach and pressure washing. Still blue.
Anyone know how to get windshield wiper fluid stains off a garage floor?