Due to a large haul of Lego pieces I acquired from a friend, I took a look back at my collection of loose Lego parts to make some room for them. The problem is that I have an overabundance of tires which are very dirty. What should I do to clean them? If my childhood memories are correct, just washing or rinsing them in water alone was never enough; when left to dry, dust re-adhered to the tires in larger quantities -especially when dried off with a napkin. What must be done to get them looking and feeling like new?