How to lure isopods out of wood?

I only put five isopods in This bin but I can the isopods hide in the holes of the wood. I am trying to remove them and put this peice of wood in another setup and a cork flat in this one.

I only put five isopods in This bin but I can the isopods hide in the holes of the wood. I am trying to remove them and put this peice of wood in another setup and a cork flat in this one.