In a post on Facebook, the GNR states: “We suggest using a defroster to inhibit ice or frost build-up to ensure visibility while driving”.
The post adds that: “You can also prepare a "homemade" defrosting liquid to spray glass, just follow one of the following recipes":
- To three parts water, one of vinegar; or
- To two parts of water, one of alcohol.
“Alternatively shave the ice using a plastic card you have in your wallet”.
They conclude with a warning: “Do not put alcohol or vinegar in the windshield wiper water tank”.
Also, do NOT pour hot water (e.g. from a kettle) onto your windscreen, as you will risk cracking it. You can probably use slightly warm/coldish water with care.
By Ed from Lisbon on 26 Jan 2023, 13:59
I have used tepid water in a jug for over 40 years in the UK to clear windscreens & windows & Never had a problem at all, & temps have been a lot lower than here in Portugal
By carl mason from Algarve on 30 Jan 2023, 09:42