How to repair your rear defroster.
It is that time of year again.
First pick up either a rear window repair kit or one of these:

From
http://www.frys.com mg 8420-p silver conductive pen
Start by looking at your rear window and locating the broken traces. I have put a white piece of paper behind the glass and look from the outside, the non-same colored areas are where the traces are broken.
Crappy photo but you will see in a minute.

Use a Sharpie to highlight the areas to be repaired.
On the inside of the car, clean the window with brake clean or lacquer thinner on the lines to remove wax and dirt.

Using a straight edge, cover the area to be repaired with the pen

When you are done, and have cleaned up all the residue it will look like

If the tabs on the left or right have come unglued, then they make a conductive epoxy that you can glue them back on with…
Enjoy.