I have the same "overdispensing" issue, in addition to the cleaning light being on all the time to spite the multiple cleanings. They replaced once, but now want $20 shipping to do that. From what I can see on line, there have been lots and lots of failures with this product. They know that most people won't pay the $20 shipping. I think a class action suit is called for, so we can all get our $100 or so back.