I'm just trying to remove the knobs on my new (to me) Genesis Silver B so I can clean them. I've tried pulling straight up on them and they don't pop right off, and I don't want to break anything but yanking on them if I'm supposed to be doing something else. On the other hand, if I'm really just supposed to pull up hard on them (and that isn't likely to break the knobs) I'd love to know it. Thanks!