Sorry to hear he passed. But now you have good tips for the future, so that if you decided to have a herp, you'll know how to do the set up and what to do if your herp is sick. It's true, a lot of people learn about herps by making mistakes.
Yeah, one more question though, how long did you have him for? If over a year did you ever replace the UVB bulb?
Sorry about your loss. Those little guys are very sensitive and many people often lose their first ones. They hide their illness well until it's too late.
Did you read the care sheet? They shouldnt be in a glass terrarium at all. And arent those temps too hot??