I have Intex 18x52 with 80110-2 sand filter and Krystal Klear SWG. I also have the Intex pool cleaner that runs on return flow. Last year I didn’t have any problems running the automatic cleaner. This year I back flush the filter and the cleaner works for a few minutes and then stops moving. I disassembled the cleaner and lubed the directional valve without any improvement. Short of a higher capacity pump, which would be limited by the small dual inlets, what type of improvements would you recommend? Thanks!