To use the defroster mod for clearing ice off the rear windscreen, you will probably have already fitted
the 'Airscarf mod'.
Although, it could just be a stand alone, safety mod for melting winter ice to improve vision if required. This mod will also remove condensation and, if positioned to do so, will dry damp carpets with ease.
Personally, I have added an additional air pipe, to one of the drivers side footwell heater outlets, for this extra safety function. The extra air-pipe can be seen in the final pic below entitled
'airscarf away'. With a third hot air-pipe I am able to use the airscarf feature and defrost the rear screen at the same time.
Pull the airscarf from one of the seats and point it at the back windscreen. A three second job. Start the car - heater on.
Before defrosting the rear screen it looked like this.
After defrosting for 5 minutes, visibility is much improved.
Before defrosting.
After defrosting.
Before defrosting.
After defrosting.
Air blows through the airscarf and to the front screen at the same time.
Airscarf deployed.
Airscarf away.
5 minutes later, visibility is drastically increased improving safety and, for those of us insane enough, the screen is supple and ready for the roof to be folded down with less chance of damaging the previously cold, brittle plastic.
Alternatively, just drive your journey with the air hose positioned at the rear windscreen and it will be ice and mist free constantly.
Another great tip originally provided by Broon and revived by PQD44 is the clingfilm tip that stops your rear screen totally freezing overnight -
Put two strips of clingfilm over the rear screen, tuck it in at the sides.
Midnight, it's starting to freeze.
Minus -6c degrees in the morning. Let's see if this tip worked.
It did a great job. Excellent in fact.
Bonus air mods.
If you can think of a function in your car where warm air is beneficial, then this mod is a bonus. For example;- Ever had to slipstream a lorry for wet slush to clear your screen because of frozen water in your washer bottle? Ice in the window washer bottle could be melted using this mod with a smaller bore of air-pipe or hose. That same warm air could unfreeze pipes and jetwash nozzles too.
If you use your car through the winter, it may also be worth adding this additional mod to keep your water from freezing;-
Heated Windscreen Washers
- Warming the washer pipes to prevent ice build up.