Who wants to take an icy cold bit in his mouth? Not this horse.
Since his comfort is important to me, I created a bit warmer. It consists of a hot or cold comfort pack that I picked up at a drug store and an insulated bag designed to keep food hot or cold. (See photos)
Heat the gel comfort pack in the microwave and place it inside the insulated bag. Fold the comfort pack around the bit and zip up the bag. By the time you are done grooming, the bit is nice and warm.