I have noticed that peppers that previously had been scalding hot a few days earlier lose all of their heat when the weather here gets cold. Especially if there is a frost. Even if I cover my pepper plants with blankets to keep the frost off, the peppers still lose their heat. Last season, we had a very early frost. I protected the plants as best as I could with blankets. The peppers lost all their heat by the next day. Gradually those peppers regained their heat level. Any explanations?