I put the Apiguard wherever there's space, usually to the side. There's usually no space between the two half blocks … I cut them all the way through with a breadknife, but don't cut through the wrapper on the 'far side'. I then split it open, lay cling film over the cut face to stop it sealing back together again, pop it back in the box for transport, then open it like a book over the QE (remembering to remove the cling film).

In my experience the fondant only drips down if the colony expires. I've only ever seen this in overwintered mini-nucs.