I am currently serving in Afghanistan and our Keuring B130 quit working a few days ago. We had to go back to the old fashioned coffeemaker, which was very painful. I was waiting on my wife to send some Keurig Cleaner from the states, when I got desperate and decided to research it on the web. I found your site, used the paper clip trick, and ran two cups of straight vinegar through it and it works like a champ again. The Taliban can sleep easier knowing that we're no longer Keurig-deprived of our caffeine fix. Thanks for the very informative site! Happy Holidays to all from Afghanistan!