I had problem with middle trackpoint button which stopped to work and got new keyboard from Lenovo. Unfortunately after few hours of using the new keyboard, Backspace and later the big blue Enter key as well started to make loud squeaky or "scratchy" noises. Much louder and different than typical space bar loud click. Especially when pressed in left bottom corner slowly about 1 mm, then release (my 8 years old R51 has the same Enter key and it is still pretty silent with original keyboard). The shape of Enter key is not the US one-row but the bigger square one
used on some localized keyboards.
Lenovo service refuses to replace that new keyboard under warranty again (well, as expected). Is there any fix ? I would rather don't try to pop out the key but the key mechanics is partially accessible via holes in the keyboard metal plate. Would putting some grease to the mechanics help ?