Some time ago I attached the Ferrex wall cleaner attachment to my Ferrex Pressure Hose. It seems now to be stuck on. I’m not certain how to detach it. I have turned off the hose and the power and released any residual pressure and water. It seems to be stuck fast at each wand attachment. There is a collar at the end of each wand part that may be something to do with how to detach it. Any help much appreciated.
