Has anyone actually fixed their's? I've read a number of posts about non-working ones (like mine), but never any of them being fixed.

I've checked the fuse box and connection in the C-pillar and both seem fine, but still zero heat on the glass

 

Time to start troubleshooting?
Do you have power at the defroster grid plug? If not work your way back to find power.

Are there any broken traces in the grid?
.
.
.