Next time you go to Harbor Fright look in the woodworking stuff for their item #67143. Its a wood moisture tester. To buy one made here in the US, you'll pay a couple of hundred or more. The Chinese one is 12.99 less the 20% coupon discount. Test your firewood to see how seasoned it is. I understand the need for more accurate readings if you're doing a woodworking project, but 1% or 2% won't make a bit of difference if you're burning it.
I have no idea how to alter the seasoning process other than nature. This summer we had a series of 100 degree days. Really unusual around here. I'm guessing those days will accelerate the drying process (along with the 90+ degree days and very dry summer). The only way I know of to test how the drying is coming is to burn some of the wood. Then if I like the results, the tester readings make some sense.