Here´s an interesting article about taking care of our guitars in difficult climate conditon. It´s from The Sounding Board, the C. F. Martin magazine, and describes how to take care of acoustic instruments, but it´s a good read anyway and valid for hollowbodys as well. Scroll down to page 18 and 19 and enjoy.
http://www.martinguitar.com/news/PDF/Vol_31.pdf