I recently brewed an American brown ale that didn't turn out like I expected. There is enough bitterness but it doesn't have the hop flavor and aroma that I expected. My plan was to add 1oz each of cascade and centennial to the keg. I wasn't sure if I should let the keg get to room temperature to get more out of the hops? Also, if I bag them would you just leave them in for the life of the keg, or do they need to be removed to avoid get grassy flavors?