So I am sure everyone has had a blast pressing these badboys on and it’s probably a moot point at this stage but in case anyone is interested: this stuff is what you want. I just swab the inside of the knob and the slide right on.
“~P-80® Temporary Assembly Lubricants are unique assembly aids designed to ease assembly operations by reducing the force needed to install rubber and plastic parts. Once assembly is complete the lubricant dries and part returns to its original condition. Once dry, P-80 Lubricants will not become slippery again, even in the presence of moisture. P-80 Temporary Assembly Lubricants do not contain silicone, alcohol, or petroleum distillates. P-80 Lubricants are safe for use on most natural and synthetic rubbers, metals and plastics. P-80 products are safe for workers and the environment.”