I added a robber screen to one of my hives. Apparently, when the bees couldn't figure out how to get in immediately, some figured out how to wedge themselves into the slot in the back (even though there was a plastic board in there -- the slots for the screen and board insert are in the back of this sbb). There are a number of bees now between the plastic slide-in board and the screen. What should I do? Things I'm considering: 1) ignore them figuring they're only there for a couple more weeks anyway; 2) remove the plastic board and hope they figure it out or that when the confused workers die, the rest of the bees clean up the mess (if there is one); 3) replace the sbb with the regular one and deal with displaced bees and possibly comb (rather not do this as I like the sbb for checking for mites and such); or 4) something else? I'm assuming they can't get into the rest of the hive from there as the screen, while removable, seems pretty tight.