Whenever you make an effort to unscrew it, you could unscrew the nut at the other close in the tube instead. This will allow the parts with the lamp system to return apart, but that isn’t a huge difficulty. Just use pliers to twist the base from the tube (Photograph http://cashihezu.look4blog.com/33850933/a-simple-key-for-dyson-vacuum-service-boulder-unveiled