Why does my drafting chair keep sinking and how do I fix it?

A drafting chair that slowly sinks has a failing gas cylinder. The pressurized nitrogen inside the cylinder can no longer hold the set height under body weight. The fix is to replace the gas cylinder — it is a standard part available from most office furniture suppliers. Cylinders are sized by diameter and stroke length; your chair's documentation or label will list the specs. This is typically a DIY repair requiring only basic tools. OfficeFurniture2go.com can source replacement cylinders for many brands — call 1-800-460-0858.