Is there any brush you can clean slide out from ground ?

I have been thinking about getting something for my slide and you have started me going on this. I took an old paint roller and re-bent it in a vise. Thinking about attaching a 1 x (3 maybe), the length of the width of roof on the slide. Then getting some kind of mop material to attach to that. I have a telescoping pole that I got from H D that screws on the paint roller.