Ours died 2 years ago, we have really hard water and get quite the lime build up in there. We had it replaced within the week. There are 5 of us in the house, so lots of dishes. We now use Lemi-Shine in every load and this one looks brand new, even after two years.
All dishes get rinsed and loaded immediately after any meal. So there is no build up in the sink or on the counter. The kids are really good at it now at 11, 13 and 15. I have a full load every evening. Would not want to live without it. :)