Too wet can be a problem, I noticed that with my cloner running 24/7 they do root faster on the timer and rapid rooters do hold a lot of water. It may break down to an oxygen issue since you can clone in a glass of water and that's about as wet as it get

https://www.growweedeasy.com/how-to-clone-weed-in-a-cup-of-water-easy

I think the reason there is so much conflicting info on cloning is because so many methods work,