Help! My baby jumped out of his tank :(

I never thought I would have to make a post like this- and i’m so scared for my axolotl Mucku. I found him outside of his tank, and he was probably out there for a few hours (I last saw him in the morning). As soon as I saw him, I put him back in his tank and immediately got a tub ready for him. I gave him a tea bath with Indian almond extract I boiled with water (and obviously let cool), and did it for fifteen minutes. I put him into a tub with fresh conditioned water after his tea bath and added his bubbler in there to give some oxygenation. Is there anything else I can do for him?? He won’t eat either. His skin is really dehydrated and it’s peeling in the water- if there’s anything at all I can do please tell me!

Also, I already ordered egg crate on amazon for a lid. I have a lid, but it doesn’t fit with the bamboo in the tank.