I purchased a new Pentair Rebel (2 wheeled Pool Cleaner)a little over a year ago, and it worked fine. Now it just goes in circles and only cleans one side of the pool. I have to drag the hose attached to the Rebel around the pool to clean the entire area. I'm working harder then the pool cleaner. We have checked all the places that might restrict it moving in one area and so slow. We found nothing wrong. (checked suction, checked for dirt and leaves in cleaner and skimmer, At a price tag of over $400.00, I'm disappointed in this item. I was told by my pool builder that this was one of the better cleaners. What is going on with this pool cleaner. I even relocated the floater attached to the hose, NO CHANGE! i don't know what the problem could be. Can anyone help me with this issue?