Ok, well these are my first snakes so I know I'm going to make some stupid mistakes like this, but I want to get things right. The humidifier is still just not really cutting it, if I leave it on for several hours and then turn it off I can get the humidity around 75%, but while its on it never goes over 55% - due to the heat the humidifier puts off. That's why I put it in the cage, I thought with it being as ineffective as it is, it wouldn't do anything outside the cage.
But I would really like to hear how to run PVC pipe from the humidifier into the cage as I think it just looks terrible in there, and I definitely dont want any harm to come to the snakes as a result. And I'll get the holes covered.