If you need to clean your Honeywell 50250 air filter, you can do so using a vacuum cleaner or a dishwasher. First, remove the filter from your appliance and place it in a shallow dish. Add enough hot water to cover the filter and add one tablespoon of liquid dish soap. Gently swish the filter around in the soapy water until it is clean. Rinse the filter off with hot water and allow it to air dry before reinstalling it in your appliance.