Should be the authority holder hole chair big & nbsp; & nbsp; pressure lever against the tight no room for organ rebound , you look at the chair lift handle is not very tight & nbsp; & nbsp; lift up when it is not not much space? If so then this chair quality is substandard , it is recommended to replace the & nbsp ; if it can not be returned & nbsp ; can be a temporary solution: the chair down from & nbsp ; to mention the 5 -star feet dangling & nbsp ; with a hammer class to the chair base beat & nbsp ; let the air pressure between the rod and the chair base a little bit of a gap & nbsp; & nbsp; the problem is solved . hope this helps. & Nbsp;