I have seen some cars where there are breaks to the defroster grid, but
it is usually on much older vehicles.
I have also seen a few that have been repaired with the paint-on kits,
and the repair has never looked very good. On my 1978 Datsun 280Z, I
just took a razor blade and scraped the entire grid off.
FWIW - The manual for UK 2010 model CR-V quotes :-
The rear window demister wires are bonded to the inside of the glass.
Wiping vigorously up-and-down can dislodge and break the demister wires.
When cleaning the rear window, use gentle pressure and wipe side-to-side."
This is preceded by instructions on various combinations of fluids and
cloths/paper which I won't go into here, but I will quote them if asked and
without any silly smart remarks.
Some of you folks are most uncharitable and arrogant - perhaps the guy with
the 07 Accord lost the manual. Also he may not have got that far into it
yet - after all it was on page 474 of 551 in mine!
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