Removable downstems are easy to clean and replace, but sometimes they can become stuck. When this happens, you can put a vibrating object (phone, electronic toothbrush, razor, or anything else you may have) near the joint while it is hanging upside down to help shake it loose. At the same time, you can try to pull it out. It’s best to have a mat or some other type of cushion underneath your work area, in case the downstem is dislodged unexpectedly.