because the snow has to come off and a shovel is the best option i have a tool that i use when i detail my car. i use a grouting sponge with sand paper taped on one side of it to remove the caked on dirt. before you do that just run it through a hoffmans car wash, but it has to be the ones where they use the brushes and cloth on your car as you go through. after that get them to dry it with dirty terry cloth towels. then use the sand papered sponge and give it another good wash. you can dry it or not, then just slap a bunch of wax on it in the middle of the hot sun…you should be pretty much good to go after that