Shifting bugs is the priority of screenwash in the summer, but at this time of year, the focus turns to sweeping road grime off the glass. There are specialist cold weather mixes such as CarPlan’s Sub Zero, but our pick is the Sonax Clear View 1:100 (pictured) – 25 litres of solutions costs less than one pound. Whatever screenwash you use, though, make sure it is mixed to a higher concentration to prevent the jets freezing.