Over time, food spills and other garbage may clog the track the drawer rides on. If you can remove your drawer, thoroughly clean the tracks, glides, rollers, and so on using degreaser and some dish detergent on a damp rag. Then wipe all of the components with a clean, damp rag and lightly oil the track with a household lubricant. If the drawer continues to be stiff, you may need to replace the rollers, ball-bearings, or tracks.