3C: Better Performance in Rainy Weather

Hello.

My Trekker works much better when it's wet or after being washed.
What could that be?
Especially since rain only falls from above and doesn't flood all the various circuit components.

Sometimes I spray some Teflon lubricant on the ball joint of the selector lever (underneath the gear stick), and that helps a bit too.

The primary suspect is the sliding clutch located at the front of the transmission (part number 1K0 711 550 A).

Does anyone have any ideas about this?

Thank you.
Martin.