Close all doors and windows near airco unit. Turn airco to highest “cooling” position and highest fan speed.and spray the HG Air-Co Cleaner from about 40 cm underneath the air-inlet, and about 20 cm away from the unit. Avoid wind or draft from blowing cleaner away. Allow can to empty itself and keep unit running for 10 minutes after can has emptied itself.
Turn airco system off, allow open windows and doors for air flow.