I think I finally figured out the solution to a clogged Keurig, so here goes. Mine quit working on a weekend, would not dispense at all, so I did the vinegar and paper clip deal. Then the descale light went on, still nothing. I decided to let it sit till Monday, trying every now and again to get it to work and using the paper clip as well. I was ready to turn it upside own and give it a spanking as one person suggested, when it finally did begin to dispense. I noticed LOTS of coffee grounds, so I kept pouring the vinegar through several times until I didn't see anymore grounds. Then I filled it with water and let it sit for 4 hours. I put a used kcup in and let the water run through several times to try to de-vinegarize it. Also, since the water sits in it all the time, I am trying to remember to unplug it, empty reservoir, tip and empty remaining water if I'm going to be gone for over a weekend. People who have the single serve mini brewer don't seem to have the scaling issue probably since it empties each time. If all else fails, call Keurig, even if it's out of warranty. I have read they will do all they can to help resolve your issue, including sending a new brewer, so youhave nothing to lose!
On a different note, any ideas on how to fix laptop keyboard...keys don't work unless you hit hard and slow...stickykeys not turned on, nothing spilled....thanks!