The one in my pic was still slightly moist not saturated of course but left moist residue on my fingers. The same was with another one I had opened that had a similar but smaller burn spot. The third one was more moist then the other two and had no burn marks.
Hmm. Were they maybe burned dry and then refilled? Given that my manufacturing flaw is apparently not the norm, it stands to reason there may be something else going on to physically burn them.