I don't have near the experience as others on here, but the only time I've had a bad shed I over hydrated. I misted the snake directly and it had the opposite effect intended. You mentioned soaking the snake multiple times and if you do it pre-shed it will backfire. After all that's 100% humidity. I couldn't tell from your OP if you were soaking pre-shed or just post-shed. I'm pretty sure your numbers are adequate, and maybe a pro can chime in but you may be overdoing it.