Remove the drawers from the dresser and set them aside.
Examine the slides on the inside of the dresser frame. Tighten any loose screws on the slides with a screwdriver.
Sand the corners of the slides lightly with 120-grit sandpaper using even strokes back and forth with the grain of the wood. This will help remove any imperfections in the wood caused by the drawers rubbing against the slides.
Rub paste wax onto the slides with a cloth rag. This will allow the drawers to move freely on the slides in the dresser without any friction.