As every parent knows, it helps to have a stash of tools, toys and gadgets nearby when you’re trying to make a cleaning project fun. Here are some tried-and-true car cleaning techniques that do more than take the hassle out of car cleaning, they elevate what can be a frustrating job into a fun one: Best Car Cleaning Tips Mayonnaise on Road Tar You may as well start with the car cleaning task that people tend to dread most: removing tar stains from the body. Smear some mayonnaise on the stains and let it sit for at least 10 minutes before buffing the stains away. You’ll be amazed by how easily the stains wipe away. Toothpaste and an Old Toothbrush