I live in a hot climate, I do not harvest till stalks completely dry and the corn feels dry, then it should be hung upside down, inside and dried sort of like you dry herbs… use clothes pins and you don’t want them touching each other, I haven’t tried the mesh bag method yet. But that method you move the corn in it around and rotate the bags around. Hanging method check the kernels once or twice a week by collecting a few off of different cobs… then see how it pops. When it seems to be popping good, go ahead and shell it, place the kernels in an air tight container.
There is a dehydrator method I have not used that yet, but apparently you can also pop the popcorn in it. But I need to do more research on how best to use dehydrator for this. The temperature I do have so far for this is 120-130 F
If your dried popcorn is not popping in could have gotten to dry as the popcorn needs to have some moisture in it to pop about 14%. But if you are like me I don’t have a way to measure water content so I just have to eyeball and test and adjust. You can add moisture back by filling a quart jar with popcorn and add 1 tablespoon of water, shake well, check it every now and then and shake again till water absorbed. Check to see if it will pop every three to 4 days, if water absorbed but not popping well, repeat the process till it pops properly.
I hope this helps.