One other long term solution in the winter is to get a humidifier for the room the snakes are in. It will help normalize the ambient humidity in the room thus making it less of an uphill battle against these dry winter months.
^ this. before i stopped using my glass enclosure my humidifier was a gosh-send come winter time.
With this annoying cold snap attacking most of North America, heaters are going to sap humidity like mad. Your best bet is to mist twice a day but make sure between misting that the sides of the tank are drying out.
Your absolute best location for humidity gauges are a few inches above the surface of the substrate. This allows you to gauge the ambient air humidity and not just the surface of the substrate which may be slightly damp and thus give you a false sense of humid environment.
On the subject of substrate, it is fine to lightly mist the substrate but it needs to dry out between misting. If you notice the walls of the tank or the substrate itself is still damp when you go to mist then hold off until the next time to mist.
Because of how dry heaters can make houses, it might get sub 20% humidity in your house which is going to make keeping a glass tank even harder to control. I would resign yourself to trying to shoot for 50% humidity. If the snake is going into shed you can then be more liberal with misting and even think on adding a humid hide.
One other long term solution in the winter is to get a humidifier for the room the snakes are in. It will help normalize the ambient humidity in the room thus making it less of an uphill battle against these dry winter months.
funny you say that lol, i already have a humidifier in there, i actually have a whole home humidifier on my furnace as well, but the vent in the reptile room is closed so it doesnt get too hot in there
Well then what are you worried about Mr fancy pants whole home humidifier system
LOL i have the vent closed in the reptile room cause i leave the door closed and i dont want it getting too hot, so i use a space heater in there, plus i let the house get down to 63 while we are working