My 8 month old Roomba Discovery has just started moving forward and "wiggling" back and forth in the middle of the room when you turn it on, goes about 2 feet, then turns and wiggles back to where it started 2' away. Wheels are cleared of hair, etc, blew it out with compressed air for dust on sensors, etc. It still responds to the bumber, turns 45 degrees or so then starts wiggling again. Any ideas?
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