Product review (5 stars): Amazing! You can feel the clogs melt away
Just used it for the first time to defrost the water dispenser in my GE refrigerator.  Amazing!  You can feel the clogs melt away.  I had a clog over a foot into the line.  It only took a minute to get my water flowing again.  No more spending half an hour in front of the thing with a hair dryer.

I didn't want to buy the GE heater element b/c it seemed dumb to heat my freezer just to get my dispenser to work, and some reviews for the heater complained they still got freeze ups.  This is perfect.  I can live with spending a minute every few months to unclog the line.  Of course GE should've designed the thing better from the start.

It's expensive for what it is, but don't bother trying to make one yourself.  The tubing that feeds in is very thin.  Just pay the guy who came up with this brilliant solution to a problem you shouldn't be having.