Cleaning Resin Chairs

I would use warm soapy water and a scrub brush, providing just hosing them off doesn't work. My thought is that, even though the "ground in" dirt might not look nice, as long as there isn't wet dirt, or enough lose dust on them that would soil a person's clothes, that is good enough.

I use the Mr Clean Eraser pads (although I use the generic kind from the dollar store). They work miracles on resin anything.