Quick question. I have a great Porter that we are drinking right now. Really happy with the flavor etc. but every time I open a bottle it fizzes out all over the place to the detriment of the floor and counter top. It settles in a minute but I am wasting hard won beer! What did i do wrong? Could bottling at 7500' have anything to do with it? Too much sugar at bottling? (1/3 cup)? Whaddaya think?