My shower leaks when water is splashed onto the trim plate around the water dial. I assume there is some sort of gasket that needs to be replaced. I do not know what any of these parts are called.
Please enlighten me as to the name of the parts I'll be dealing with, and any information that may be helpful in fixing this problem.
To be clear, I can run the shower for a solid hour when nobody is in there with no leaking. Once someone splashes water onto the handle or spigot, water can be seen leaking around the pipe (witnessed through access panel).