In the US pollination is the main function of bees, it's big money. Every manner of pesticides, fungicides and antibiotics are used within the hives by commercial beekeepers not to mention all the pesticides that are used on the crops the bees visit. The bees are also fed HFCS to keep them alive just long enough to pollinate the crops. When a hive finally kicks the bucket it is replaced with a new hive from the same narrow genetic pool. This new hive moves into the old bee box which is full of toxic beeswax; it's a wonder that bees survive at all. Personally I would never use commercial beeswax, technically the bees are not supposed to be treated with chemicals while there is honey in the hive, they're supposed to wait until after extraction to treat the hives so no residue gets into the honey. We keep our own hives and don't treat them with any chemicals.