To ensure that you have your window AC working well in proper condition at all times, you have to maintain and clean the unit. To do this is easy and the cleaning can be done by yourself. Before you start, make sure that the device is completely switched off and unplugged. Follow your instruction manual and open the AC to reach the filter. This filter can be either reusable or replaceable; you will find what type of filter it is on the manual itself. If you do have a reusable filter make sure you clean it once every month at the most. For the filter, you can vacuum it free from any dust or hair and then proceed to wash the filter with warm water and some soap. Ensure that the filter is dried off before you place it back into the AC unit. After you have washed and kept the filter to dry make sure you dust the exterior and the grills with a cloth and mild soapy warm water. For this to make sure you leave it to air dry before you shut the AC. Make sure you gently dust off the fins and coils as well that are inside the AC. Furthermore, you can use a damp cloth to clean and empty the drip tray and the cleaning drain of your AC unit. Let all of this air dry before you reassemble and close your device.