If you are de-misting or de-icing your front window you will do it much quicker by having the sun shields down. Logic: the warm air will be sent back down or deflected to the windscreen instead of going to the roof. If you have air-con that will also help but it uses more fuel.
If you have a super-duper car or a Nubian slave to do it for you then you can ignore this valuable tip.
More use-ful/less tips to follow. Your tips welcome.
Be Good. Take Care.
