Often times when I make a bad shot. I can feel that the club is sliding inside my hands (I feel the club sliding, inside my golfing gloves, I wear two gloves to prevent blisters btw)
I have been playing with overlap grip, thusfar, though (the vardon grip)
My handsize is men's small. At least it says so in my footjoy golfing glove, which fits ok.
The club sliding happens during the downswing, at some part of it.
This causes the clubface to open itself, during the downswing, which is rather unwanted.
Club sliding causes for me, an open clubface at impact. Sometimes the club slides even a little bit, during the followthrough!!!
All of these experiences lead me to believe that I've played with incorrect grip, thusfar.
I had some wrist pain in my left hand, after leaving the range today, also...
I realized this after watching a grip guide video embedded at sandtrap forums.
In all my pro lessons, I never had a pro actually teach me the correct grip (presumably I thought there was never anything wrong with it)