No matter how sparkling your caravan is when you set off, by the time you pitch up it’s bound to have picked up some grime. One-chem’s cleaner will leave your van with a shiny, waxed finish. The clincher is that it’s concentrated, which means you don’t have to find room for gallons of it.

A capful makes 10 litres of cleaning liquid, and one bottle will do up to 40 washes. This makes each wash work out at about 25p, which is fantastic value.