Look behind the curtains of the best well, kept homes or in the corners of your hardwood floors and you may see several white dots clustered together. No, it's not mold or paint splatter. That's spider poop. You can't sweep it up, but it is easy enough to remove with a paint scraper. Use a new blade and be gentle and it should be perfectly safe for your hardwood. In seconds, you will have a beautiful floor again....for a while.