i purchased the clone brews book and have noticed that none of the recipes are explicit about the use of hops...for example i know that there are basically three uses for hops in a recipe, and each are added at different times during the boil...however, the recipes never tell you if once you boil the hop for the proper amount of time, do you then take your muslin bag of hops out of the wort...or do you continue to boil the bag even after adding the next set of hops...and also, it doesn't say if you leave in the bags once you pour into the primary...i know some recipes out there do leave bags in, but is this the most common way to do it?