Cooks and hortulanus are one in the same. Temps in the low to mid 80's, a hide box of some sort, water dish, paper towel substrate is fine, average humidity but not constantly damp.
I keep my amazons in HOMZ containers that are sold in any K-mart. I use 17 qt. for babies and smalls...and the 30 qt. sweater boxes for mediums and larges. I use hide caves and rock water dishes. I actually never mist mine but I live in s. florida and it is a little humid here so the air doesn't get dried out by a heater constantly being on. I also use paper towels for substrate just because it is easy to clean and change when they go to the bathroom.
I have loads of amazons so if you have any questions feel free to post away!
Try setting him up in a 'shoe box' type environment with something to hide under and a water dish and he will do better. That's a pretty open space with not much to hide in so he may be stressed a bit.