First make sure the chair is on a even surface and is level, if this is all in alignment let's proceed. I always try to use organic materials when possible. So I go to olive oil first, you can also use WD40. Put this on the springs and bolts under the seat. Make sure you have a cloth for any extra oil that could stain, if you haven't already protected the area (seat and space where fixing).
If it still squeaks go to every bolt, screw, and spring seeing if they are tight, or evenly tightened. You can adjust them or just unscrew and redo to make sure each one is in its correct position. If the chair is older, use the oil (or DW40) before you unscrew the screws or bolts. Then apply again before you replace them. This step will make sure everything is lubricated evenly.
This should have your squeaky chair as quiet as the day it was bought. Remember moisture in the air or air conditioning causes rust, so using the oil prevents and removes the built up rust keeping it from happening again in the future.
Source: Common sense, I watched my daddy and brothers do this all the time
By Luana M. from San Diego, CA
By Cricket from Parkton, NC
How do you remove the seat mount on an office chair in order to fix a squeak?
By Scrcrow from Orem, UT
No need to remove the mount. Just get a can of WD-40 with the long straw on it and poke it up in there to give it a good spray.
How can you fix squeaky office chairs?
Linda P from PA
By Cali's Mom