Anyone DIYed your own low temp screen wash? Isopropyl alcohol can be had for £17 for 5L. on amazon.
Yes but with industrial methylated spirit
That Prestone extreme linked to at Eurocarparts for £12.99 is £6 in Tesco
I hope to be wrong but the Tesco one is ready mix rather than concentrate.
On the other hand Carparts4less (in other words ECP 4 less) charged me £8 each or so for concentrate last week, delivered at ECP ut it was free delivery anyway if you buy enough. It is my go to.
https://www.carparts4less.co.uk/p/prestone-18c-concentrated-screenwash-5ltrs-552996320
Conversely, covering your windscreen in toilet roll overnight would probably stop it icing up.

That Prestone extreme linked to at Eurocarparts for £12.99 is £6 in Tesco
I'm also assuming Tesco is selling ready mix.
None to be found in these parts. Have we been transported back to the Soviet Union?
I had minus 10 rated stuff in my VW passat last Monday when I was driving up the M74 to Glasgow in minus 10 temps (according to the car). Needless to say the washer jet lines froze, then the wiper motors packed up/froze. Had to stop 3 times on the hard shoulder to clean the car windscreen manually as I could not bloody see 😬😳
Bought 25litres of -20C stuff yesterday - nothing was available for miles around, so now have a lifetimes supply sat ready in the middle of Ayrshire
Temperatures going back up to 12ish tomorrow - am sure that's related to my purchase
