Krytox GPL 205g0 is a grease lubricant that is used commonly to lubricate switches, especially linear switches and often tactiles with care. The lube helps eliminates the scratchiness and produces a more desirable acoustic sound and feeling in switches. 

This is purchased from Miller-Stephenson, more info can be found here.

This lube can also be used for stabilizers and springs. 

Features:

• 2ml in a container (can cover 200~ switches with 2mL)
• 5ml in a container. Enough lube to cover many switches and lubricate stabs.