humidity is in the low 30%to 40% how can i raise it?

[Toronto Python Gurus]

i would suggest gettin rid of the heat lamps, BP's prefer "belly" heat and the heat off those lights is probably making it drier in the tanks, if you have a screen top which i think i read you had then you can cover the "hot" side with something to allow less air to escape . . . maybe changin the substrate will help to i find that aspen shavings are great for keepin in the humidity and its fairly easy to clean aswell, coconut husk is great for humidity aswell but its a little messier