The Bit That Actually Matters
Screen wash is one of those things you buy in a hurry at a petrol station, overpay for, and then forget about until the reservoir's empty again on the M6 behind a lorry spraying road grime at 70mph. Prestone's Extreme Performance concentrate is the smarter move, honestly. You dilute it yourself, so a 2.5 litre bottle goes a fair way depending on the mix ratio you need for the season.
The formula handles temperatures down to around -35°C at full strength, which is overkill for most of the UK, but reassuring if you're in Scotland or just the kind of person who forgets to top up until November. At a diluted mix for typical British winters, this bottle will last you several fill-ups easily.
Who It's Actually For
If you drive regularly, especially on motorways or country roads, this is just sensible. The concentrated format means less plastic waste per wash cycle too, which is a minor win. It cleans properly, no streaking issues on a cold morning, and the smell isn't offensive like some budget alternatives.
Personally I'd say it's not for someone who only drives twice a week around town. You'd get through it slowly enough that ready-mixed stuff might be less faff. But for regular drivers, the value per litre here is spot on.
One reservation: the discount apparently applies at checkout rather than showing upfront, which is slightly annoying. Just make sure you check the final price before you confirm. The HotUKDeals community clearly rate it though, nearly 1,000 heat points is not nothing.
