Finally, an advantage to us photographers living in Hilo, HI. We receive an average of 126" of rain per year. It's almost impossible to keep the humidity in my controlled darkroom 60%, it's usually 70%. When I don't run my air conditioner with dry control, can read 80%! Our electricity is highest in the nation so can't afford to run my air conditioner 24/7. When it rains day after day, after day, I've gone 2 weeks without dusting, (there's very little dust). No suggestions, above posts pretty much covers all bases, just had to vocalize. {There are plenty of other issues we have to contend with, for one - lens, film, paper grow mold).