I have purchased few cubic meters of already seasoned firewood and I have been hapilly burning them in my wood stove. They are stored in my detached, non-heated garage. Over time I realized that more smoke is coming out and they are making sizzling sound in the wood stove but there is no visible bubling on the sides.
I am thinking that moisture from my car (Often it is parked in the garage too even though it is wet) evaporates and gets absorbed by the firewood. This is my theory in terms of why firewood has degraded. Can it be true? Would it affect the moisture content that much? What can I do to lower the moisture content? I have let some stay in the house overnight but not much has changed.