How do you guys prevent mold from groiwing

[Frognerd]

If you're using the right materials in the terrarium and there is adequate ventilation, mould should at worst be a temporary problem. What's the mould growing on?

haha I don`t even have a terrarium yet.I was just wondering why mold doesn`t grow in warm and humid enviroments where mold can thrive.
Thanks for all the information.