I purchased Bellawood brand Pre Finished Bamboo floors in a very dark brown color, and no matter what product I use to clean them, even just hot water, it leaves a film on top and never looks clean. Is there a phone number I can call to talk to the manufacturer or any suggestions you might have. I have already tried the Bona floor cleaner and it still leaves the same film as the others. User's recommendation: Don't buy very dark.