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only 3 of the bars are working, its expensive to replace the whole rear window just because the de-mister doesnt work!
did some googleing and found a product called "conductive silver paint" that re-connects the broken bars.
its available from CPC, Maplins, Farnell, and ebay.
bought a 3 gram bottle last week from cpc.
cleaned the inside rear window, used a dry wipe pen to mark/arrow the broken bars. what you look for is and scratches thru the bars, discoloured sections or clearly missing bits!
with a size 000(very thin artist) brush, paint over the marked sections.
leave for 24hrs before using de-mister.
http://cpc.farnell.com/electrolube/scp03b/silver-conductive-paint-3g/dp/SASCP03B
shall see if it works next cold morning we have....