Drying film. Not everyone has a dedicated darkroom at home in which to develop their film, and a common problem is spots (dust) on negatives. So what to do? A great solution is to hang your film to dry in the bathroom. Run the shower for a couple of minutes with hot water to steam things up a little. This will remove dust from the air. Hang your film from the shower curtain rod for about two hours or so (until dry) with the door closed - try not to use the bathroom during that time, which will stir up the dust again.