[Mike #1]

sorry about the delayed reply me and pingu have had this debate before maybe i have just been lucky but it has worked for me 50ml in every 25 ltr container i know pingu has tried and tested isopropanol without sucess it's all trial and error , But when i have stored water over night it has not froze in garage even when the temp has dropped to -7 with iso in continers

[Tim82]

sorry about the delayed reply me and pingu have had this debate before maybe i have just been lucky but it has worked for me 50ml in every 25 ltr container i know pingu has tried and tested isopropanol without sucess it's all trial and error , But when i have stored water over night it has not froze in garage even when the temp has dropped to -7 with iso in continers

Well if that works for you then that's great!

Barry's screenwash method has helped me loads last couple of days loads of snow around, but no probs at all.

I know it seems strange but the water even felt a bit warm when coming out?? Maybe it's just staying at room temperature because it's unable to freeze(??)