I have been using the swiffer system in combination with the Mint Plus (which uses just water to mop) and I am not sure it that is the problem or the combination of dark wood but I feel like I can never keep them looking clean. We have 2 big dogs that track dirt from the back yard and the floor has white streaks! It only looks clean immediately after a mop. Me and the dogs walk around for half and hour and I feel like I need to go over it again. I also need help.