Put a saucer of warm water in there -it has to be able to pick something up.
I have successfully reduced water content by placing 30lb bucket of honey in warming cabinet alongside a windowsill dehumidifier (the type you put the white crystals in). Depending on the original water content and how much I need to bring it down by, 24 - 48 hrs is usually enough. If you can give the contents of the bucket a stir a couple of times that helps.
I have friends who reduce the water content down by placing honey in shallow tray on a warming rack above their aga, stirring occasionally.