Over the summer months i had noticed a lot of moisture in my grit and mineral pots,my loft is well ventilated and is raised 1ft off the ground.My birds are well into moult now and some are showing signs of respiritory.I have a lot of trees at the rear and the ground is vey moist,usually it dries up through the summer but not this year.any advise on how to reduce the moisture in my loft.