For tough spots like
paint drips, tar, and pencil and pen marks, use a nonabrasive bathtub
cleaner or nylon scrub pad (Photo 2). Use ammonia
cleaners or a solution of 1 part bleach in 4 parts water to
clean mold and mildew stains. (However, never mix ammonia and bleach.) Rinse thoroughly while the
siding is still wet.
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