How to lower humidity for my 3 month old childrens python

[Teklord198]

So im currently keeping my 3 month old childrens python in a 20x20x15 cm enclosure using critter comfort fine bedding with a heat mat set to 30° and a shot glass for his water bowl but im running into the problem of his enclosure having condensation and humidity around 90% even with a fan going in the room just wondering if you guys know any tips to lower it

 

[dragonlover1]

does your enclosure have vents in it ? or a mesh top? Airflow is important

 

[Teklord198]

does your enclosure have vents in it ? or a mesh top? Airflow is important

Yeah it has a mesh top and when I'm at home I'll take the lid off