Petr can definitely be a dancer sometimes! I could have worded my original response better, should have been geared more toward dispelling the negative view of foggers your post put out there. But I still stand by what I said.
So how much foliage do you have in your viv? You should be able to create the correct humidity gradients without the humidifier. How are you measuring humidity and at what points? Humidity should be viewed the same way we view temps. Your goal should not be to have identical amounts of humidity through out the entire viv, you should be making pockets of varying humidity levels throughout the entire viv. This allows your Cham to move in and out of these gradients as he sees fit to regulate his body’s needs.