I was wondering if this is the issue. I hit that damned key probably 2-3 times a week. I am a terrible typist. It doesn't really slow me however as the limitations to my work speed are not my typing. However if my typing is what is causing me to hit that key, this changes everything.
Spend a few days learning how to type better and then practice 30 min a day until you have it down. Even if your work isn't constrained by typing speed it will change your world.