Same issue a few weeks back.
I put a smidgen of grease off the grease gun on my finger and put a very tiny amount on the bastards.
It kind of let them stick to the carb as you put the 2 pieces together.
Thought of vaseline, but couldn't find any and I also thought it might react badly with the rubber.
Get it right the 1st or 2nd time or they then become slippery all over
