not sure what topic this goes in but i was wondering i have a 75g tank and the sides sometimes get a little cloudy on the inside on the glass, wondering what is the best way to clean them, i jsut have been taking a sponge on a stick and cleaning it that way but it does not work the greatest, any ideas on how to do it when doing my wc? ppl say viniger but i dont wanna drain the tank down that far.