It is springtime, birds are mating, trees are mating, pollen is everywhere. Clean the crap from birds and trees off your car. I prefer using the high pressure hoses at the local coin operated car wash, but a sponge and hose will do. Clean the inside and outside thoroughly, this is called detailing. It makes your car looks and smell so fresh and so clean. Here are some before and after pictures of my VW GTI pre and post wash.