My bag is starting to look a little grubby....probably makeup rubbing off onto it (wish it would just stay on my face where it belongs!). what can I do at home to clean canvas? I don't want to risk ruining it, but its not anywhere needing a spa treatment yet. I figured you would know.. also, is there anything I can do for vibrato? I don't have an eraser for it and there's a small spot where it rubbed against my new jeans.