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Apply and Scrub Mold with Extension Brush — Inspect and repeat if necessary

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How to Clean Mildew and Algae Off Outdoor Steps · Step 6 of 7

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Once your cleaning solution (either bleach-based or TSP-based) is prepared, it's time for application and scrubbing. Pour your selected solution into a bucket or load it into a pump sprayer. Apply the solution directly to the mold and mildew-affected areas of your home's exterior. For efficient and safe cleaning, especially on higher sections, attach a stiff-bristle brush to an aluminum extension handle. This allows you to stand on the ground and reach various heights without the need for a ladder, significantly reducing the risk of falls. Scrub the moldy surfaces vigorously with the brush, ensuring the bristles work the cleaning solution into the mold and dislodge it from the surface. For deeply embedded or stubborn mold, you may let the solution sit for a few minutes before scrubbing. After scrubbing, thoroughly rinse the treated area with clean water using a garden hose to remove all cleaning solution residues and loosened mold.

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