Anytime I remove the reservoir the plastic lit falls off. Also the o-ring for the reservoir cap fell out and is non replaceable by the manufacture. I called and they were kind enough to send me a new reservoir at no cost since I have only owned the unit for a week. Could I be the only one to need a replacement o-ring? I still have the original Drinkwell which is about 15 years old. It's a little noisy but still keeps working. I have to kick it once in a while to get it started though.