1. Some say that it is good to use wood because the bees will propolize the walls along with all the cracks. The propolis is supposed to provide a more healthy environment for the bees. I've read that the bees won't propolize polystyrene. Is it worth the trouble to try to line the interior of a poly hive with some thin strips of hardboard, so that they can propolize it?
2. For those who run poly hives (or wood) with no top ventilation, do you ever give a top entrance in warmer weather, either for improved bee access, or greater ventilation?