I got my ball python yesterday, and I am having a hard time regulating the humidity in his tub.

I've had the tub set up for 3 days, and every time I check, the humidity is about 80-90%. I misted the tub once on the 1st day, and there is a small water dish in there too. I'm using newsprint for substrate. I have 1 line of holes on all sides of the tub.

I live on Vancouver Island, and it is humid here right now. (About 75%-80%)

How can I lower the humidity in his tub? I honestly have no idea.