i painted the outside of a large rubbermaid tub and around the top a little with krylon fusion i have let it dry almost a week now...i started to get it ready to put my fish in it and i took a wet paper towel to the inside to get some dust and such out and the towel keeps getting black paint!...in areas i didnt even paint...i have been rinsiing and wiping for about and hour now and still getting the same thing....any suggestions...i dont want to kill my fish 

