Scrubbing

With summer on the way it's time to give my climbing frame a good scrub ... I'm just debating whether to rinse it off with the hose or wait for the rain to do it!

"But can’t you just wave your hand and make all the dirt fly away, then?"
[...]
"That works, but only if you wave them about on the floor with a scrubbing brush."
(Terry Pratchett - from Wintersmith)