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I've done a couple of patios where the cream color washes right off the concrete w the surface cleaner. Any suggestions? I just did one and the surface cleaner marks are still there-any way to fix it? thx as always, Blackjack

I just cleaned a roof recently and there was a big black stain where a false chimney came out. The guy said he had a deisel burning furnice. Chlorine didn't work; I wonder if a good dereaser might do it! Any suggestions? Thanks as always. Blackjack

I've read that the mold on roofs eats at the granules on the shingles shortening their life span. Of course I've read this on pw companies web sites. 3M (shingle manufacturer) claims that the mold will not damage shingles and that it's strictly an aesthetic problem. It stands to reason that the...

I have seen a few roof cleaning products that are sodium hydroxide based. Does anyone know what to mix sodium hydroxide with if I buy the raw material. I'm assuming I can dilute it with water but how much? I saw Pressure Pros recommend sodium hydroxide and butyl(for concrete I believe)...

Anyway to clean green algae off screen enclosures besides bleach? The frame looks clean when its wet and then dries with agae still present. I'm sure bleach can't be good for the metal.???? thx in advance

thx everyone for your answers to my question. HOT WATER is it

Could somebody please tell me the best way to remove gum from walkways without a hot water machine. thx in advance