I am having a prblwem with that, and it seems you live where i DO. The news as saying the RH was very low the nex couple days. Should clear up, but i have been watering way more (my system has excelent air flow). Make sure your not overwatering tho! (styick finger 2 in deep for watery soil on finger.
no im not overwatering because im using a mist spray can. it seems that in certain types of soil the water cannot penetrate deep enough.
I think your underwatering it... you really cant give your plant too much water, you can water too often. I use one of those sports botttles, i use to use a sprayer untill I ran into problems like you are. You want to give it a good soaking, let it sit for 15 minutes, then soak again. You dont want any dry areas of soil. When you do this put a container under your pot and collect the runoff. Ideally you should collect 25% of the water you put in. Then dont water again untill your pot starts to feel light.