On Tue, 17 Jan 2017 18:22:46 -0000, James Wilkinson Sword wrote:

By the time the side windows have been squirted and cleared even
frozen on snow will just slide off the heated front and rear
screens.
B-)

NOt really, even with electrically heated ones.

Must have imagined sliding the 2" of snow off the screen last week
then letting the auto wipers deal with it once the sensor saw
water
blobs instead of snow.

Snow just puts a strain on the motor. The problem is when the rubber is
frozen to the screen.

Even if they are by the time the frost has melted to water blobs that
the sensor sees as "rain" the blades won't be frozen to the screen.
They might still be encased in ice but the ice/glass bond will be
very weak.

--
Cheers
Dave.