Its not until someone says, "Well, I never thought of that!" that you
realise that maybe you do have a tip to pass on.
Getting the old grey rubber tubing off brass nipples is a real pain, as
more often than not, its welded itself on.
So, arm yourself with a medium soldering iron with a bit the size of the
nipple aperture, insert it for a few seconds, take it out, and, use a
pair of small pliers behind the sleeve of rubber, lever the sleeve off.
It will come away smoothly and cleanly.
Once you develop the rhythm of heating one, whilst you're removing the
previous one, you can clear a stack in 10 minutes.
Best wishes to all