- Jun 5, 2017
I used the power washer earlier to remove it without any ill effects, but the dust is pretty stubborn, so there is still a small deposit left. I guessed that a sponge might be a bit risky. I'm hoping that a few heavy rain showers will take care of the rest.I've got a massively over-powered Kärscher. I'd use it to pour water rather then to pressure wash. Better even to just use a hose at normal pressure and to avoid using even as much as a sponge. Just rinse it off a couple of times.