I've been a hammocker for 15+ year and have never had this happen before. My wife and I were camping near Caddo Lake (big natural cypress swamp) last week. During the day and evening, the skeeters weren't particularly active....but...
Upon waking, we were both covered with no-see-um and skeeter bites from head to toe...the little suckers were biting through the bottom of our Hennesseys!
The second night, we slathered on DEET gravy and the bites stopped, all but a few.

My question to other hammockers in skeeter land is, how do you deal with bite-throughs? Here in hot Texas, we don't use back pads in the hammocks in summer and T-shirts are the sleepwear.
I'm wondering if there is a bug treatment for nylon (the hammock itself) that won't cause it to rot or weaken. I don't like sleeping in bug repellent unless absolutely necessary, since it goes on all day to ward off ticks and chiggers.