I use a hothead too and the flame is never orange. Except when I douse something in the cup of water nearby, it goes orange for a sec. It sounds like a defective torch honestly. Your flame should be blue with some yellow at the base but not orange around the edges. You are correct, that is a dirty flame.
I hate to say it but you'll want to wait for a replacement. You're gonna have dirty beads all around with what you have and you don't wanna waste that glass!
edit: I am too broke to use MAPP gas all the time so I switched to Propane and have no issues with the hothead.