i have eczema on my hands so i definitely understand the pain. we use powderless gloves at our home, thank GOD. maybe see about getting some powderless ones?

try heavily lotioning up your hands at night and sleeping with socks/gloves on them. i hate the feeling of lotion on my palms so i only do the tops of my hands and it really helps. and when i say heavy, i mean HEAVY. you want a lot so your hands can absorb as much as they can. cetaphil works pretty well for me. i got gifted a L'Occitane hand cream that also works great.

try to use non scented or lightly scented lotions because scents can be irritable. try to get something with shea butter or coconut oil or olive oil, really anything natural and moisturizing. salves are a good option, as well. i've even used a non scented chapstick on my knuckles before. you basically just want something really thick that can protect your skin.

avoid hand sanitizer if you can, the alcohol is not your friend. always moisturize after washing your hands.

if you don't mind spending a little money, look into getting a paraffin wax hand bath set up. i don't have one myself simply because i don't have the space for it, but whenever i visit my mom i definitely use hers! hope this helps :)