Hi,
This really isn't a problem with ball pythons.
Besides you will be opening the tank fairly often once they have settled in to chck on them, change the water, clean the tank etc.
I would put in a piece of slate or similar in the tank if you have a loose substrate ( like aspen, reptibark, coconut coir etc ) and leave any food on there - it might reduce any problems with things sticking to wet mice once they start swallowing.
dr del