The answer to 'how to clean ductless system' is to regularly clean the air filters and indoor unit of your ductless HVAC system. This helps maintain efficiency, improve indoor air quality, and extend the lifespan of your equipment.
Start by turning off power to the indoor unit. Remove the air filter and gently vacuum or rinse it with warm water to remove dust and debris. Wipe down the interior surfaces of the indoor unit with a soft, damp cloth to remove any buildup. Be careful not to get water on any electrical components. For the outdoor unit, use a garden hose to gently spray off the coils and clear away any leaves or debris around the unit.