Clean the the tramp with de-greaser, dish washing detergent (rinsed well) or bon-ami

I have done that. Brand new boat, 1st race, and 15-20 kts. Downwind I was out of control. Sliding across the tramp, barely staying on the boat.

Later one of my friends commented, "you were great downwind. How does rolling around on the tramp cursing at the top of your lungs make you go so fast"