Q. The tube does not come out of the glass tube properly.
A. When silicon tube cannot be removed, do not force pull it out but cut open the silicon tube with a cutter knife, etc. to remove it. If the glass tube and silicon tube are left connected for a long period of time, the silicon may have been hardened and causes difficulty in removing the silicon tube. In this case, replace with a new silicon tube. A silicon tube is contained in Clear Parts Set (or Gray Parts Set).