I bought a large soft pretzel at a pretzel shop yesterday. When you buy them, they are warm and soft. What's the best way to reheat it so that it's as though I just bought it? 
It'll never be the same as when it's new. The closest I've ever seen is a method often used for good bagels: put in paper bag with a bit of water and nuke it. Basically just reheat it with a lot of humidity. 