Ok so I was testing the humidity in the tubs in my newly built rack, and without holes, but a gap between the tub and the wood on top of about 1 to 2mm it was 65%. But then I moved the rack around and accidentally spilt some of the water on to the newspaper and within a minute it went up to 92%!!!

Obviously, we will not deliberately "spill" water, but sometimes snakes may do that. Should I set the humidity with number of holes to the point where it is 60% without any water spilt? Or should I take that into consideration?