and doors
For ordinary algae, allowing an appropriate cleaner to do most of the work is often safer than trying to blast the stain away.
If you do use a pressure washer, follow the siding
manufacturer’s recommendations and use the lowest effective pressure.
What About Household Bleach?
Diluted chlorine bleach is sometimes used for exterior algae and mildew, but it requires extra caution.
It can damage plants, discolor some materials, irritate skin and eyes, and create hazardous fumes if combined with incompatible cleaners.
Never mix chlorine bleach with vinegar, ammonia,
