If your hair dryer has a removable filter, you can clean it with relative ease. Start by unplugging your hair dryer and removing the filter. Most filters can be washed with soap and water, but consult your hair dryer’s manual to be sure. Once the filter is clean, allow it to air dry completely before putting it back in the hair dryer.
If your hair dryer doesn’t have a removable filter, you can still clean it—just not as easily. Start by unplugging the hair dryer and holding it so that the vent is pointing down into a sink or garbage can. Use a small brush (toothbrushes work well) to gently remove any lint or debris from the vent opening. Be careful not to push too hard or you could damage the internal components of your hair dryer. Once you’ve removed all the debris you can reach, use compressed air to blow out any remaining lint or dirt.