Stains

Does anyone know how to get old stains out of car-seat seat belts? Our infant seat has been in the attic for about a year and the stains look so bad!

Update on last post:
Reece kept screaming every time we put her in her big-girl bed for naps and at bed time, so we decided not to rush things. (We even tried buying Dora sheets and a Dora pillow!) We don't want her to totally hate her big girl room and the baby! We still have a few months to move her as the baby will be in our room for awhile.

Thanks for your sweet and encouraging comments.