Vermont: propolis has many functions, one is bee glue. The bees will fill in any crack or crevice that otherwise would support mold or mildew or larger parasites such as beetles. The bees know what they are doing in the hive, we don?t, so let the bees do their job. I know, I realize the glue can be a pain but there is a far reaching purpose. Propolis contains antibiotics, anti fungus, antimildew and other purposes we have yet to realize.
I don?t remove propolis unless I just absolutely have to with an active hive. I will clean frames when starting a new hive or wintered surplus frames.
Go into any health food, organic store and honeybee propolis is for sale. Some folks eat propolis for health reasons and swear by it, personaly I do not.
Blessings