Lamp dimmer will only decrease... having the dimmer on max is like plugging the lamp directly into the wall.... my high side sits at 90 and low side at 80 .... humidity at 50-60%... if you have a screen lid cover 2/3 of the top with a damp towel or t-shirt... if you have a tub reduce airflow through the tub.... misting also helps. and as far as your water bowl goes.... u should always have clean water in it