I currently have a batch of Cru Select going and the directions don't seem to directly mention the elderflower bags. I put them in the primary and they are puffed up and floating. I tried poking a several holes in each bag but a few hours later they are puffed and floating again. Is it neccesary to punch them down daily to avoid any nasties(like a grape pack) or are they fine just floating throughout the fermentation? I was also wondering if they should be pressed prior to racking to the carboy or if that would add unwanted bitterness.