Lately I've been fiddling around with my string hand. I used to have my thumb pointing straight up along the side of my face, but I found it made my hand and wrist feel really tense and it was difficult to get a good release. Now I have my thumb tucked in, but depending on how I hold it it seems to dig into the side of my face, pushing my string hand away from my face or throw off my anchor (middle finger in the corner of my mouth)
How do you guys hold your thumbs?