Halfords Night Before De-icer, has been on my shopping list for around 5 years now,
3 for the price of 2 offers usually.
You will see which temps & types of frost it works best with, to save wasting it,
Just spray on the outside of the glass when you park up.
basically it stops the Ice/Frost sticking to the Glass.
It keeps your wiper blades soft & doesnt smear badly.
I little carton on salt with cling film over it & a few holes to reduce moisture in the vehicle,
one in the car & one in the boot.
works for me, even of others dont believe in it..
(Or Gell Silca if you want the real stuff)
Tescos have just started stocking 'Window Cleaner with Rain X included' in a spray container. ?5.87
Maybe less wasteful than applying Rain X with a cloth.
But Possibly not worth using if you are going to use night before De-icer.
'Fog X' used inside the glass is worth its weight in gold i think.
2 minute defrost this morning.
Got the B&Q Greenhouse fan heater & extension cable ready for later this week.
(i set it at to come on at 3 degrees celcius)
george