Lubricating certain parts or areas inside a cherry MX switch greatly smoothens out the travel and reduces that scratchy feeling if done "properly."
"Properly" is used loosely because the feel will differ between each switch depending on what type of lube is used, on which switch. Some area of lubing can also be debatable whether it's actually needed or not.
Lubing stabilizers:
• Lubing stabilizers (Costar and Cherry)