Creality Ender 5 Plus Squeaking

Creality Ender 5 Plus Squeaking

Makes a "loud" Squeaking noise as the bed moves downwards.

I have tried oil and Lithium grease on the Threaded rods but it still Squeaks.

I have tried "new" Threaded rods and nuts but it still Squeaks.

I have tried disconnecting the coupling at the steppers and turning the steppers, no squeaking from the steepers if just the steppers turn without being connected to the Threaded rods.

I have tried disconnecting the linear bearings these slide up and down the guide rods without issues.

Are you able to advise any possible solutions to stop the squeaking and the Creality Ender 5 plus printer bed moving up or down?

Thanking You for any advice or help