Thoughts on this company’s process?

If you’re just washing dust or dirt away can’t water alone clean? (serious question) When you spray SH on siding, let it dwell for about 10 minutes, it kills off organics, and they are then washed away.

If there’s a big grease stain on the siding something else will have to be used. If it’s just basic dirt and algae SH and surfactant seem to do the trick.

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Well water and a little surfactant alone will do that. You have to use different products to clean different things. Just dirt? Low pressure water. Algae and mildew? Bleach. Rust? Oxalic acid. Obviously SH isnt a cure all, but most houses being cleaned have algae, so it is going to be used.