My Dolphin DX3 doesn't work like it used to

by Joey Regan
(Iota Louisiana)

I have a Dolphin DX3 robot pool cleaner. It doesn't wonder around the pool anymore, It'll just stay in one area going back and forth. I have a 20X40 unground pool, and the robot today is going back and forth from north to south but just cleaning the east side. I moved it tp the west side and now it is staying on the north side going back and forth from east to west.