the best thing that ever came out in this hobby has been nickel silver rail and metal wheel sets…if any of you are old enough to remember the old brass track and plastic wheels you will also remember the cleaning …time and time again …the old brass rail would oxidize even if it was raining in the next county over and those old plastic wheels would get a layer of dirt built up on them after a few times around the layout…but yes…it is a good thing to keep things clean, but also, we modelers today don’t have to clean such items as much as we used to with the advent of nickel silver rail and metal wheel sets…chuck