Roomba is fully charged and cleaned with sensor wiped clean. When turned on it it sounds normal and commences to go, but it then acts like it is putting on the breaks, spins, tries to go and manages a short distance and breaks again, just not making any progress because it keeps breaking after a foot or so and turns and tries again. Sometimes is gets so stuck from moving forward at all, like it is stuck in one spot just trying to go while seemingly surrounded by barriers. Sometimes it finally it breaks out into a normal pattern and cleans until charge is exhausted, after I fiddle with it and turn it off and on a few times, but after recharging for the next use it again commences with this difficult attempt to make some distance. It doesn't do this pattern after it has begun to act normally, only when first turned on, and I have to bump and fiddle with it, turning it off and on, for it to break out of the pattern. The Roomba is over a year old and functioned properly until this symptom
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