Plastic roller on hinge had broken causing door not to open easily

Slid door off hinges. Removed 3 screws which hold hinge in place. Removed drawer to access spring for hinge. Gasped at all the crumbs and crap which had collected underneath the drawer. Cleaned up crumbs+crap from floor. Disconnected spring from hinge and removed old hinge completely. Installed new hinge with 3 screws. Attached spring to hinge - center hole fitting. Slid drawer back in place. Angled hinges outward in order to re-install door. Slid door back onto hinges. Door now operates nice and smoothly. Job well done.