I got a Smartkleen Nitro universal Cleaner about 3 weeks ago to replace my little aquabot. It seemed really durable and was for both above and inground pools, (no wall climbing). I have a 24ft round and it was really easy to set up. I've run it about 12-15 times and get a lot of dirt and debris, but it doesn't clean the Middle of the pool! It leaves about an 8ft circle of uncleanded area. Anybody ever heard of this? maybe it just doesn't work good on round pools? thanks.