I use mittens for that. Usually going uphill my body will make thin gloves work no matter what, but you stop for just a few seconds and I have to get the mittens on. That seems to solve it, but I lose some dexterity obviously.I've got that too. For skiing, after years of trying different stuff, I broke down and bought heated gloves. Well worth it, especially backcountry where you've got to take gloves off for skin transitions.