My "Flipper" is only cleaning about 20 minutes before stopping. I checked and nothing is stuck in the rollers. The cord is not tangled and has plenty of free space. I've gone to their web site and tried everything they suggested. I turned everything off and unplugged, restarted and the same happens. One thing I have done is leave the little bugger in the pool 24/7 the last few weeks. Any thoughts on what to look for? Thanks