My family bought all the parts for a keyboard. It took six hours to put together (lube and film) and a couple of weeks to break in, but it's probably the best
How to Lube Keyboard Switches without Desoldering - Switch and Click
How to lube your keyboard switches for an even smoother feel
How To Lube and Properly Tune Stabilizers - 2022 - YouTube
Top Keyboard Lubricant for Quiet & Smooth Switches - Antala Ltd.