Prestone PSCW0029A Winter Screenwash, 5 Litre

Product Information

Using Prestone Screen Wash is easy. Simply add enough screen wash to the reservoir so it meets the ‘max’ line, and then use your car’s wiper function (normally an arm switch on the steering wheel) to apply it to the front and rear windows. First we calculated the costs of each in their winter and summer mixes. For the former we chose coverage down to about -10C, where there was a choice of mixes. However, there was some good news. As we didn’t need the full -20C protection we economised and tried a few different concentrations to see how they fared in the freezer. A mix of 50/50 with water was still squirting after 12 hours at -18C, so it would seem Halfords is understating its performance. The instructions recommend it is used at the ‘optimum clean’ dilution ratio of 1:9, which stops freezing down to a claimed -3 oC.

In summer this makes it seem good value compared to some ready-mix rivals, but the advantage disappears in winter.Prestone Extreme Performance Screen Wash ensures maximum cleaning power to remove stubborn dirt from your windscreen. It also helps you drive in extreme conditions all year round, by melting ice down to -18ᵒC and preventing dangerous sun dazzle. The first reason is that it freezes, which doesn’t bode well on frosty winter mornings. If water freezes in the wash reservoir or jets, it could cause lasting damage when you try and spray the screen wash, and this will cost you money to repair.

Plus, summer means the arrival of a sneaky danger — sun dazzle. Dazzle occurs when the sun’s rays shine on dirt and grime on a car’s windscreen, limiting visibility for the driver. If you keep your windscreen free of dirt and smears, then you’ll get better visibility and won’t have any nasty sun related surprises. Myth 2: Don’t use screen wash –water does the same thing The second reason is that water simply won’t remove tough dirt, stains and marks caused by dead insects and tree sap. Over time, this can lead to reduced visibility, and prolonged abrasion could even damage the windscreen. Myth 3: You can use washing up liquid or other household cleaners In summer, it makes up to 10 litres and give protection against freezing down to -2C. If you need to go any colder it’ll need to be used 1:1 or even neat. The instructions say this will remain fluid down to -10C, so unsurprisingly it was solid after a few hours in our freezer compartment. Prestone Screen Wash contains powerful cleaning agents that remove tough deposits and ensure a streak-free finish. Combined with the optimum quantity of antifreeze, our windscreen washer fluid guarantees maximum protection and visibility in all driving conditions. It’s a legal requirement– that’s right, you could receive a fixed penalty notice if the police pull you over and discover you have no screen wash, especially when there’s reason to believe that reduced visibility has caused you to drive dangerously.One myth surrounding screen wash is the idea that ready-to-use products don’t offer good value for money. The great thing about ready-to-use screen wash is that it’s been pre-mixed by professionals, so you can always guarantee great performance and freeze protection.