I've only had him for 10 days. I fed him last friday. I bought him from petco so I don't have any idea how often they were feeding him there.
I keep him in a 20 gallon terrarium. i keep the humidity up with a damp rag over the top, it seems to be working quite well.
I have an analog humidity gauge. Probably not super accurate but I've been keeping it ~65-70%