>...spraying medication all over our hives at random. 

It isn’t sprayed “all over our hives at random.” It is sprayed directly on the bees where they go to 
work cleaning each other off by consuming the syrup. 

>If it is going to work at all, it is only going to work when bees eat the stuff. 

Exactly. That is what the bees do when they clean their nestmates with syrup that has been 
sprayed or poured on them. 

>FEED the stuff to your bees.
at the risk of repeating myself. oh, never mind. 

Regards,
Dick Allen

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