Air Conditioning vs Open Windows

I woke up with dry eyes and a dry throat. I think this is symptomatic of having the AC running all night. I'm not sure, however, if this is better or worse than being restless all night because of the heat and humidity. I suppose decent sleep and dehydration is better than poor sleep and sweat that can't evaporate. Oh well, whatta you do?

I hear the washing machine beeping and must now go.