Did you take before and after pictures of your old place? Some landlords will charge you a cleaning fee if you cleaned the place or not. In the U.S., they are not supposed to charge you for normal wear and tear, but you will have to take the to court (or at least threaten them) to get your deposit back. You are not responsible for "turning" your old apartment, meaning you should leave it clean out without damage, but you are not responsible for the final cleaning before the next tenant moves in. Vacumming, dusting, etc., is expected to be done by the landlord.