I just got a Black Kingsnake, just a baby now. However, sometimes I see some cockroaches in the house. They're about the size of my thumbnail. If they get into the snake tank, can they harm the snake? Can they spread bacteria? If the snake eats them, will it get sick? If I cover the air slits in the tank wall, is there a way to make the tank breathable but insect-proof? Any advice would be highly appreciated. I'm a first-time reptile owner.