My Dolphin is dead after an almost 4 year run. Great cleaner although the cable gets very twisted after several runs, even though it’s a swivel type. Had to replace the cable last year (60’) and the new one wasn’t better in that regard. Anyone know whether Polaris’ swivel cable is less prone to tangling / more adept at untangling? I’m leaning toward sticking with Maytronics but if Polaris has solved the tangling issue that might sway me. TIA.