RPCV
Avid Member
According to the statistics (http://www.currentresults.com/Weather/Pennsylvania/humidity-annual.php) the ambient humidity is in the high 60's low 70's. I would stop trying to raise the humidity, it is high enough already. Any higher and your desert chameleon will probably get a respiratory infection. I would set up an auto drip system and mist occasionally. This will solve the hydration problem.
Don't pay attention to ambient humidity or a vet that thinks you'll achieve 80%RH in the winter in Pennsylvania (unless you completely block off air flow).
Humidity refers to the amount of water vapor in the air. It is commonly expressed as percent relative humidity (%RH), defined as the ratio of the amount of moisture in the air compared to the maximum amount which could be in the air at a particular temperature. Warm air has the capacity to hold much more moisture than cold air. If the ambient outdoor temperature is 30 degrees and 65% RH and you bring that air indoors and warm it to 70 degrees the relative humidity will be 15% even though the amount of moisture vapor in the air is the same. Maintaining 80% RH in cold weather climates is not realistic or desired.
Looking at your photo and description it appears you have plenty of moisture in the enclosure. If anything I would be concerned it is too much for the amount of airflow being provided.