Help. Even though I have a screen, small brown balls from the many oak trees get through. They float and end up sticking to the tile in spots where the circulation jets can't reach. I'm looking for an automated solution - rather than me having to brush the tile often. Seems like something that would float around and brush the sides without getting caught in the skimmer. Or, something to create waves, like a float on a pneumatic cylinder going up and down. Wave action causes them to unstick from the tile and circulate so that the skimmer can get them. Any ideas?