Do window a/c units have to be hosed out regularly? I see corrosion of the case after less than a year, and the fins seem to clog up with algae or something near the wetted bottom. This is in a very hot, salty air environment sheltered from the rain.
I saw some older units nearby, also panasonic, with just shocking corrosion - the fins almost eaten totally away to bare coils (lower ones) and some casing corrosion where the vents were stamped into the sides (stamped after painting, so bare metal is exposed).
Unfortunately it is awkward to hose the thing - maybe a spritz sprayer is possible. I didn't expect this corrosion and worry about algae or whatever messing up efficiency, but no preventative maintence is mentioned in the user guide. Maybe the exposed metal vents in casing should be painted, but probably too late. Thanks for any advice...