Rejuvination of 15GP22's

[JBL_1]

Working on my CT-100 and have the horizontal, vertical and high voltage operating. The filaments on the 15GP22 light and the neck is not glowing but the raster is almost non existent. The brightness control does extinguish the light but it is really really dim. The room has to be pitch black. The getters are about 50% so the tube is/has been leaking. Anyone have cathode cleaner type rejuvinator??? Anyone had any luck bringing back a tube like this??