fixing a slow drip Delta Monitor?

I have a single knob Delta Monitor shower control, the kind you turn to the right for hot water or the left for cold and off. There are two screws on its round face plate. It is about 2 years old. I have a leak of a drop or two a second, they for the most part come in short fast spurts. It seems to be getting worse. How can I fix this?
Tim Sexton, December 2004


done
No answer, but I have the same model with the same problem.

dennis, January 2005