Therefore, I used it first for myself and then for my mother-in-law. The device works well for knocking out food. I charged the battery just enough but not frequently enough. But as time went on and my (irrigator) likely operated more than satisfactorily for more than 3 years, the water pressure progressively deteriorated, and I believe the battery simply started to die. In terms of jet pressure, my mother-in-law was even more effective than I was, but he also passed away after working for less than three years. You decide how much I want from technology, but I gave it a 3 because of the battery. It only works because there is an Oral-B electric toothbrush, and I used it much more frequently. I can't remember how long it has worked, but it has probably been more than 5 or 6 years.
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