I made a framboise for my wife 1-1/2 years ago. Just kegged it yesterday. I like it, but my wife isn't sold on it yet (she said it's too sour, and not very sweet). I need to add sugar to it, so I picked up some lactose today. The question is...how much should I add to a 4.5 gallon batch? And will the Brett eat it? I have it under refrigeration now, so I think that should limit most activity. Or am I mistaken?