This is all a bit of a puzzle to me.
Ihavetwo Elizabeth’s, both bought from the same supplier in France about 4-6 weeks apart. I use one in UK and one in France.
On the French one the wand moves very easily whether hot or cold and there is no noise or roughness felt while moving it. On the UK one the wand is quite stiff to move but doesn’t creak. No difference whether hot or cold.
I will have a look at the seals and spring on the UK one when I get back in July and see if lubrication will help. The difference is odd as they are both only about 6 months old and have been in use for about 3 months each so far.
Maybe it might be worth asking Lelit for advice. They respond very quickly to queries and usually offer very helpful advice. They might even have a short video on this problem or might make one if they get several queries about it.