Frequently: Cabinet interior should be cleaned frequently, any spills must be immediately cleaned, Exterior can be cleaned as needed. Use warm water and mild soap or baking soda to clean.
Every 4 - 6 Months: Clean the condenser coil and fan with vacuum and stiff bristle brush
Annually: Clean the condensate evaporator pan thoroughly with sponge and warm soapy water - dry well
Source: Oklahoma School of Science and Mathemathics (Community Member)