Bre is prone to pretty bad tear stains. I do her folds about every 3 days with hydrogen peroxide on a cotton ball. Scrub and let them air dry. That has seemed to work the best for her, she's got pretty deep wrinkles from her eyes to muzzle.
The kibble she eats is Innova Senior (just fyi )
Good luck with that sweet Chuy...tear stains or not he is a looker!