I recently found a garter snake and am planning on keeping it, I have all the requirements- spot to hide, water and I keep it clean, also have some artificial plants on one end. (Bought some nice bedding, the water bowl fake plants and a real wood log tunnel at Petsmart) THe only thing I need some advice on is this. I have my snake right now in a 15 gallon PLASTIC bin that i modified. (Drilled some holes and cut a big rectangle on the top that I have screen on). The problem is, is that i still cant keep my humidity in the 50-60 range. It averages about 70 but goes in the 80s on rainy days. QUESTION: WOULD BUYING A GLASS 15G terrarium help lower the humidity? Or is it a waste of money? Also, since where I live its normally AT LEAST 70% humidity outside in the summer! and since my snake was wild, would it be immune to diseases that can be caused by high humidities?

PLEASE REPLIE ASAP! Thankyou lots!