I have had a polaris 380 since I put the pool in 4 years ago. It had been in the pool shop 3 times this year and cost me several hundred dollars. The problem that continues to occur is the polaris seems to have little power. It has had all its insides replaced. It now goes to the same spot in the pool and does not climbs walls. I am at a loss and cannot afford to keep sending it to the store to get fixed. I also have no more money to buy a new cleaner. Any suggestions would be greatly appreciated.