#1

My Cetus has begun making squeaking sounds, primarily when the rails move along the Z axis as well as the bed movement. Is there a recommended way to remove this noise? Do I need to add some kind of lubricant, and if so, where?

#2

The linear rails have tiny holes, where you can fill in appropriate grease with a fine injection tool. You will get more information in the datasheets of the rails (just google them).

Nevertheless the rails (those with the blue cover) have to be maintained very rarely. How long do you use your printer?