One place dust always seems to build up is on ceiling fans. Cleaning a ceiling fan is a messy job but should be done a few times a year to keep dust from being thrown into the air. Most fans are used in the spring, summer, and fall. There are a few ways to go about cleaning a fan. One option is to take a damp cloth and whip down the fan blades and the decorative light bulb covers. The other option is to unscrew the fan blades and take them down to be cleaned. You can put those decorative light covers into the dishwasher for cleaning I would recommend making sure they are dishwasher safe before doing this as they could damage a very good light cover.