Do you want water in the accommodation bilge? No. The hull will rust from the inside as said above
Keep mopping it up and try to arrange better ventilation of the area - a slot or series of holes in the floor at the back of the fridge will assist with ventilation as it pulls the cool air up over the coils.
Most importantly, find out where it is coming from and cure it. Kitchen towel placed below any plumbing joint will be a good indicator of a leak. It could also be condensation (ventilation helps here). Or it could be a leak from a window or even a roof vent.
Or it could be historical (someone spilled a load of water years ago) in which case it will eventually disappear as you keep mopping it up.