Lifetime subscription to Rainex?
Haven't put anything on it.
It tends to clear itself if you are going fast enough. Might not be able to see out of it perfectly, but you can usually make out shapes / lights, which is enough, though I rely on my wing mirrors much more anyway.
Just have to give it a wipe if it's snowed / frosted before you set off.
Fair enough, I guess it's the reversing stuff I get most concerned with, but maybe I'll think again.