If you want to know how to clean a window air conditioner, you should understand the different parts that make it. So unplug the air conditioner and remove the front panel or grill. Slide-out the filter and check the manufacturer’s manual to see if it is replaceable. If the filter is washable, use a mild, warm, washing detergent solution. Rinse it, shake off the water, and let it air dry.
Now it’s time to clean the grill and louvers, which often gather a lot of dust. Take these parts outside and apply water directly from a hose. For any tough stains, use a mild spray cleaner. If that’s not possible, you may also soak it in sing with detergent solution. Rinse the grill thoroughly, and air dry it. Then clean the housing using a damp rag or sponge. You may want to do that at least once a week to prevent the dirt from becoming too entrenched.
The last part you should clean is the condenser coil(s). Since the coils are behind layers of fins, prepare a dishwashing soap solution and use a spray bottle to apply it to the target area. Wait for a few minutes and rinse the coils and fins. You could even use a water hose if you want.