Everyone else's chair is causing problems because it sags and goes down over time. My chair gets taller over time, and it's driving me nuts. It seems kind of sporadic; normally it increases by about an inch a day but sometimes it just goes all the way up without warning, within just a few minutes of being out of the chair. My office chair sees about as much use as my bed, maybe even more, so I try to keep it at a good ergonomic height. Having to constantly readjust the height of my chair is annoying, to say the least. What is causing this? Can I do anything to anchor my chair at the correct height? Please don't tell me to buy a new chair. I could have figured that out myself without anyone else's help.
Yes, check the underside of the chair for a lock. Adjust it to the right height and then lock it.
My next door neighbour uses the lever and gets it back down for me. Every time I use the lever, it springs up. He tells me I am not heavy enough when I sit in it. Hahaha.
Call your maintenance man to fix it. That's what we do.