I hate sun block / tanning oil ect. It just washes of in my pool and leaves a bath tub ring around my title. I am sure it is coating the filter as well. I try to tell my wife and here friends that the stuff just washes off, but they are sure the will get skin cancer without it. They put it on themselfs, the kids, the dog, the neighbors kids and I have to deal with bathtub ring around my pool. Its not as if I could just get some Ajax soap or dish soap and remove it from the tile, I wouldn't want that stuff in my pool either. I hate tanning oil and sun block.