the only time that my tank fogs up like that is after i mist and then cover it back up, and the humidity level usually goes way up for at least the first few hours afterwards, so i only mist when nellie is in shed. i really can't imagine that it is only 60% in your tank if you are doing everything you say and the glass is fogged up. i'd go straight to walmart and get the accurite digital thermometer/hygrometer if i were you. the analog gauges are way off--i have one in my tank along with my accurite, and the analog gauge is consistently 10-15% off or more on the humidity.