Check the area surrounding the chair. Remove any items that are blocking the chair from reclining.
Twist the back of the chair from side to side. This will help you determine if a bracket holding the back in place is loose. Look to the lower corner of the chair where the back rest and seat meet.Tighten any loose bolts with a flat head screwdriver.
Turn the wing nuts located on the bottom of the chair to adjust the tension of chair. Turn the wing nut to the right to increase the tension. Turn the wing nut to the left to loosen the tension. A chair that is too loose will squeak. A chair that is too tight will not recline properly.
Lubricate springs with a clear mineral oil. There will always be some amount of noise associated with the chair because metal is moving over metal. Proper lubricating will eliminate some of the squeaking and prevent the breakdown of the springs.