When power washing a house, you should use a specialized, biodegradable house-washing detergent formulated specifically for exterior siding, vinyl, brick, or stucco. Top commercial options like Simple Green House and Zep House Cleaner contain active surfactants and mild mildewcides that chemically lift organic grime, dirt, and mold without requiring harsh bleach or high-pressure blasting. Always verify that the cleaning solution is explicitly rated safe for pressure washer soap injection systems.
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