I have a Ryobi planer that was developing the same problem. I UNPLUGGED IT, cranked the head all the way up and cleaned the rollers with acetone. It seems to have fixed the problem. You have to "bump" the power a few times to rotate the rollers to new areas to be cleaned -- wait for everything to stop and pull the plug again before putting your hands back down there! I tried turning the head by hand to turn the rollers, but the gearing is so high that it would take all day to get them to rotate once around. Oh, and be really careful not to cut yourself on the blades -- DAMHIKT. You should carefully turn the cutter head so that the blades are hidden before you work on the rollers each time. I also waxed the bottom and infeed and outfeed tables.