We're having that problem some days Jen due to this awful late summer weather. I don't much worry about it unless the bedding is actually getting damp and just make it a habit to give the tub front where the condensation gathers a bit of a wipe with some paper towel each day.

The only other thing that is helping is to keep the snake room window open during part of the day and keep a fan blowing. Getting fresh air in and the stale, hot air moving helps the tubs stay more stable in our snake room.