How I control ants:
 
1.   If you have spare inner covers and or outer covers, replace the ones
full of ants with spares.  Leave the old ones outside for a day or two, and
usually the ant colonies will abandon them.
 
2.  Make sure bees can get into the space between the inner and outer cover.
  Put sticks between then, if necessary.
 
3.  Seal any cracks/holes in the inner and outer covers with propolis (just
as the bees would if they could get to the holes).
 
W G. Miller
Gaithersburg, MD