Can't retract a vileda mop handle

I can't seem to retract my vileda mop handle. You can loosen it and tighten the bottom part of the handle but it is supposed to retract and extend.

Am I doing something wrong or is the handle just faulty? It is not a new handle and I can't remember if I have ever retracted it before but I have looked at youtube videos and they appear to come in a retracted position and you pull the bottom out and twist it clockwise to lock it.