Tighten all screws, bolts, and fasteners
Check and tighten the seat, legs, and armrests
Replace missing or stripped screws
Add wood glue to loose joints on wooden chairs
Clamp glued joints until fully dry
Replace cracked or broken parts
Level uneven chair legs by sanding the longer leg
Attach felt pads or furniture glides to uneven legs
Replace worn or damaged chair glides
Inspect and repair the chair base or swivel mechanism
Tighten the gas lift or center column on office chairs
Replace a damaged caster or wheel
Reassemble any misaligned parts correctly
Test the chair on a flat surface after each fix