There’s an ongoing debate about whether to squeeze the brew bag or not while it’s draining. Some brewers believe that squeezing the bag releases extra tannins from the grain, which could result in a bitter or harsh flavor later on. One way to counteract the extra tannins is to gently squeeze the bag while it’s draining. You don’t have to wring the bag out. Don’t forget to protect your hands with heat-proof gloves.