I am having humidity issues in my 2 racks. I have melted holes into the tubs via soldering iron. Yet still.. merely having a bowl of water in each tub.. the humidity is enough to form condensation in the tubs! This is super for shed times.. but not everyday life. I guess I should just melt more holes? It IS humid in our house.. but the newspaper substrate in my tubs is not that wet.. nothing to endanger them with scale rot.. but still. Any ideas?