There’s nothing like spending a few minutes cleaning your car’s glass to give a little lift to the driving experience. Grime that builds up unnoticed on the inside cuts light, and you appreciate this dulling effect once it has been removed.

The easiest way to do so is with a cloth and specialist cleaner. We put 20 through their paces on a junkyard side window smeared with grease, limiting both the number of wipes and amount of cleaner to establish which products worked best.