This is not an easy repair, but a skilled technician can do it in 30-60 minutes. Essentially, you have to disassemble the entire handle. The only tools needed are a Phillips head screwdriver and two or more small flat head screwdrivers. Possibly needle nose pliers. Turn off the power and turn on the suction at full power. Turn off the vacuum and remove the wand. If you can't let go of the wand, flip the handle and use gravity to drop the wand's release switch while you press the release button and wave the wand back and forth. If that doesn't work, you can use brute force. Look at the detail diagram. I can't post a link. You need to loosen four screws. Three on the bottom handle and one under the top cover. Remove the three screws from the bottom handle. Near the back of the handle, you should be able to squeeze a flat blade between the bottom handle and the center tube on one side. Use a flat head screwdriver to go around the bottom handle until it is removed. It helps to leave a screwdriver or two in the slot to hold it open while you work on the other. Now on the top cover (the power button and suction controls are part of this cover) locate the indentation to pry the top cover off with a small flat head screwdriver. Use a flathead screwdriver to work around the top cover until it comes loose. Be careful when you pull it out all the way so that the power button and suction control don't fall out. Pry off the control board with power switch and suction regulator. Remove the screw underneath. You can now remove the center tube from the top handle. After that, remove the wand release button from one side and then the other. If the spring cannot be removed from the old button, use needle nose pliers to remove it by pulling as close to the handle as possible. Move the spring to the new stem release button. The assembly is done in reverse order. Make sure the power button and suction controls are aligned with the control panel on the top handle at the same time before locking the top handle.