My tailgate struts often make a nasty squeaking sound.

It's worse when the tailgate's closing.

Garage I bought the FF from said "lots do that in the cold weather, you need to WD40 them".

Are they right, or is it a case of, "they would say that, wouldn't they"? What do I put here then?

WD40 is a water dispersant. I would use (and I did) a silicone based spray and it worked for me... 2019 Vogue P400e

And use the same silicone on the door rubbers to stop them freezing

This worked for me - https://www.wickes.co.uk/FloPlast-40ml-Silicon-Spray/p/175634

Just to confuse things, there is a WD40 version, but it's not regular WD40 - https://www.wickes.co.uk/WD-40-Specialist-...l/p/144012

Thank you both very much.

Have just ordered the WD40 silicone spray. What do I put here then?