Unscrew the cupboard knobs from their current location. Spray down the area with an all-purpose spray then wipe it clean.
Scoop out a dime-sized wad of wood putty with a putty knife. Pat it into the holes left by the removed knobs. Use the side of the putty knife to scrape off the excess putty and push more of it into each hole.
Give the putty an hour to dry. Measure 1 inch up from the bottom corner of the cabinet door and 1 inch inward. Mark the spot with a pencil. Drill a pilot hole with a hand-held drill and a drill bit the size of the screw attached to the back of the knob.
Screw the knob into its new hole. Sand the wood putty with 120-grit sandpaper. Wipe off the dust with a tack cloth. Dip a 1-inch nylon brush into a can of finish and cover the filled-in hole with a tiny amount of stain. Allow it to dry.