Misting plants with fertilizer can be tricky and it can introduce more problems than it solves. Unless you are spritzing a bit of dilute fertilizer directly into pitchers, its not doing a lot of good until it gets washed down into the soil, so you may as well just put a few drops into the pitchers and the rest into the soil, like normal plants. (I know opinions on this subject vary widely, but I'm one of those who believes most plants are not very capable of absorbing nutrients through the leaf surface. Roots and pitchers are designed to absorb nutrients - leaves are not) You also need to be aware that if you dump a lot of nutrient into a pitcher - be it in the form of insects or fertilizers - you are likely shortening the lifespan of those pitchers - maybe dramatically. So its best to go very lightly, or better still - just fertilize the root zone. (My personal opinion, of course; YMMV)