Ford Escape 2006 Manual page 19

The following situations possibly do damage to rear-window defogger wires: 1) using
sharp pointed tools or erosive glass detergent to clean the interior rear window; 2)
improper ways to place heat insulators. If defogger wires are not functional, the rear
window will receive different temperatures. The worst is that the glass of the rear
window will be broken.
8 The rear-window defogger is not designed for melting snow; if there is any
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snow on the rear window, please sweep it before turning on the defogger.
8 Please do not turn on the rear-window defogger too long. Please turn it off
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when it is not necessary.
+
Whenever you want to know about what danger warning light means, please check it out in the
section of roadside emergency.
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