thumbwheel doesn't turn!

I have been using and loving my 8gb Fuse for about 2mos. w/o a problem.  I even used it for 10hrs straight during a road trip to avoid the age old radio search or CD shuffle.  However, I just went on a shorter trip (6hrs.) and half way through the thumbwheel stopped turning.  Out of town, I let it sit overnight.  It started working the next morning.  So I let it be until I had to travel 2days later, but shortly after playing it “locked up” again.  What to do?

If you did not drop or damage your device in your pocket, then it sounds like a defective hardware part.  Call Support and have it replaced. 

Go Sansa!