I am having the same problem as a lot of other folks. I got this for Christmas, and the "clean" light came on after about a month of use. I thought no big deal. Except after cleaning it, the light came on again after a week. I cleaned again and then the "clean" light came on two days later.
I called customer service, and they were nice and sent me a replacement unit. Unfortunately, the same scenario. I called customer service, and this time they sent me a cleaning solution. I used the cleaning solution which lasted about two weeks. I called customer service, and they suggested based on this continuing problem to run the four-hour cleaning process. No luck. After two days, the "clean" light comes back on.
So, I once again called customer service. They send me another unit and sure enough, after another month the same results. I am at my wit's end at this point. I called to get a refund and was told since it was not purchased directly from Ninja, no refund could be offered. Now they are willing to send me a replacement unit again, but I have to return the defective unit and pay for shipping cost. I don't know what makes them think that sending me a third replacement unit is going to make a difference.
Although customer service was willing to work with me initially, their hard stance once I requested a refund is very unsatisfactory.
Bottom Line: No, I would not recommend this to a friend
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