I can't add much to that. As Tec said, uncapping some may help them decide to USE it, and if they dont use it, they will very likely MOVE it to make room in the brood nest.
I like to keep a full frame of honey to the outside, on each side of the brood nest. Putting in empty comb to replace excess capped, and freezing the capped honey will let you drop it back in if you get a dearth or another cold snap that causes them to start using the stores in the hive. If they are bringing in nectar, doing that is more likely to help than hurt. Nurse bees prefer Nectar over honey. Mostly, its choosing the method you like and being mindful of the weather.