Hey there. It sounds like you are pretty tense when you play, like I used to be, and sometimes still am.
My problem was mostly related to adhd, but I think my tips will apply to the same symptoms you have.
Before I race I will do 20 push ups, 20 situps, 10 squats and squeeze my forearm grip things about 25 times. It only takes a few minutes and puts my body into a more relaxed state, where before my ankle might twitch a bit or my arms might be tense. It sounds silly but you are still using almost all of your muscles even if it's not at full capacity. Your seating position also plays a huge role, where you try to use bigger muscle groups to make smoother movements rather than your wrists.
One check I always do is see if my tongue is touching the roof of my mouth. That's stress and you stop that. I check to see if my jaw is clenched and stop that to, because more stress. I take a deep breath in and let all of it out slowly while I relax my shoulders.
I also take 200mg of Magnesium everyday because it's a natural muscle relaxer and mood relaxer that you can actually tell is working and doesn't knock you.
Most of these tips are from my psychologist who specializes in behavioral and sports psychology used to see as a youth and he pretty much saved my life. He's also helped someone win The Masters... he wouldn't say who although it's pretty easy to figure out in Canada. 😉
I hope these tips help you out as I know what a hindrance it can be. Good luck.
I use cloves and now my hands are less sweaty which leads to a lighter grip. I don’t have the need to grip the wheel that hard because it’s less slippy.
That's what I was doing wrong... This whole time I have been using nutmeg. Drats.