A:
Yes, the filter is washable. I've copied the instructions form the use and care manual below.
Air Filter Cleaning
The air filter should be checked at least once a month to see if cleaning is
necessary. Trapped particles in the filter can build up and cause an accumulation
of frost on the cooling coils.
Grasp the filter by the center and pull up and out.
Wash the filter using liquid dishwashing detergent and warm water. Rinse filter
thoroughly. Gently shake excess water from the filter. Be sure filter is
thoroughly dry before replacing
Or instead of washing, you may vacuum the filter clean.