I have a low humidity problem.

[OhBalls]

I have a twenty long tank 90 on hot 80 on cold side. i use a uth and a ceramic lamp 100 watt i believe. But My Humidit ranges anywhere from 30-50 which isnt enough. i want to know the best way. im hesetent about using a spray bottle because i dont want mold to grow. so what do u guys think

Use the spray bottle to mist....I mist ALL my snakes everyday and never had a problem with mold. Also, try covering the tank's screen lid with aluminum tape, except where your heat and light are...it'll help hold humidity in.

Good Luck!