I own a Valley bar box with Gorina Basalt cloth (comparable to slower Simonis i think). I vaccum it regularly but it is getting a small amount of residue on your hands after u play for a while.. I used to work in a pool hall and they used to use a damp cloth and buffed the cloth... Besides the overpriced can of Chalk off is there any other ways I can clean the goo off??? Is the damp cloth a bad idea??