You can hire someone to powerwash your lanai/birdcage. It needs to be done more frequently than the siding being power-washed however! At least once a month or every six weeks or so if you use your lanai alot. Depends on how affected it gets with dust/dirt/mildew. Our lanai faces the east but we're finding we don't use it alot. Perhaps sometime down the road, we'll end up enclosing it for a FL. room.
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