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  • Then what's better? Ladder and a brush? That's straying dangerously close to 'not paying someone for something I could, technically, do myself, but actually never will'. Some guy we had round was talking about scaffolding, but that seems excessive for a 2 storey house.

  • I think the other theory is you're better not to clean it. If you clean off the muck then it leaves gaps which leak.

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