How to clean your braces?

I have clear braces, and on top of braces I have clear ribbons that circle it. Soon, ribbons get yellower, that's why they get changed. But I can't wait, since I have a concert tomorrow, and I need a perfectly white teeth. Could you guys give me some tips on how to whiten the ribbons out, because mine became very very yellow after I ate Cheese Doodles (Regret that a lot) :) Please Help! Thank you!