I'm pretty new to brewing (almost a year) and currently I only do extract brewing. My question is regarding hops. I use a hop sack and add hops at the appropriate times during the boil. My question is when should I take the hops out or should I leave them in throughout fermentation. Currently I take them out at the end of the boil right when I put the wort in the ice bath. Should I leave the hops in until the wort cools or even keep them in during fermenting?