Dirt, dust and other debris such as litter and leaves can have a detrimental impact on your car by causing rust or accelerating wear and tear, ultimately creating the need for repairs. So that’s one good reason to keep your vehicle clean and tidy, not to mention the fact that clean windows and lights will improve your visibility and hence safety, reducing the risk of damage. Moreover, a lighter car is cheaper to run. For example, a large roof rack or roof box can increase fuel consumption by as much as 30% at motorway speeds, so if you have a roof rack, take it off when not in use. And did you know that every 50 kg of extra weight in your car reduces your fuel efficiency by 10%? The message is simple: don’t haul around unnecessary weight, but find somewhere else to store your stuff instead.