On Monday, May 8, 2017 at 9:20:16 AM UTC-4, wrote:
CRC electronics cleaner from Walmart. Exotic cleaners from Allied Electronics

WD is deodorized kerosene.

WD would emulsify heavy deposits n then use CRC removing the WD.

CRC bottles on the shelf used with the pipe are compressed air/solvent tools.

when cleaning with CRC n pipe, full flow is designed n appliedas the fluid evaps leaving a clean surface but with silicone or WD try an artists paint brush or Q tip .....PCBlaster also. PC asks for a slow down wobbly pin pressure for the first half tank.