With the popularity of window film tints, the defroster grid lines are exposed
to possible damage from tint installations. This gets worse when trying
to remove old tint films. Be very careful with metal razor blades that
can easily cut through these conductive traces. If you do cut through
one of these electrical traces, you can sometimes fix them with a "silver"
conductive pen; these are available from electronic supply shops and are used
for IC board traces.
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