In the winter (when the humidity is low in your house) i'll throw a damp towel over 2/3 of the top of the cage and i'll usually get a 20% bump in humidity.In the summer i'll just do this during shed. You can switch to cypress as this emits more humidity but will also eventually dry out. But the benefits of cypress is that if you wanted to mist it resists mold and you can re-dampen it . Act soon as its tough to find cypress in the winter.