It is relatively normal to have some accumulation of dirt overtime on the unit, especially on the outlet. The level of dirt in the air and filter life play a factor in debris accumulation on the unit.
For the best results, we highly recommend changing the filters when they are due for a change. This keeps your unit clean and running at optimal performance levels!
The inlet grill may be cleaned (after the unit is turned off and unplugged) with a vacuum or a slightly damp cloth.
If you have any further questions, please reach out to us by submitting a ticket or calling 1-657-275-3734 Monday through Friday 8 am PST to 5 pm PST.