I good friend of mine recently dropped off about 100 plastic frames. They are medium frames. Last year I inserted a few plastic frames into a couple of hives, and the bees just neglected them. They did not build any comb on them, period. I removed the plastic frames and replaced them with wood frames with rite cell inserts. The bees immediately got to work on them. Have any of you had success with plastic frames, and if so, what did you do to get the bees started?