For months, I’ve been drawing in pen all over my backpack during my math class, and, the doodles look really great. I’d never erase them. Problem is, I haven’t been able to wash my backpack at all, and, to say it lightly, I’m not always thorough in disposing my lunch properly, and my backpack smells… Well, deathly. Other than hand-washing, which doesn’t really get the smell out, any ideas?