Because you need to use much less water than with the outdoor coils, fill a hand-pump spray bottle with clean water and use that. Thermostat settings should differ between winter and summer.

The Importance of Cleaning an Outside AC Unit. The coil around the outside component of your air conditioning system (the ...

The weather is heating up now that spring is here ... If you notice any bent fins, softly move them back into place. Next, spray your can of condensed air inside the unit to dust off the coils.