Does anyone know of a relative humidity chart? Here's the problem...I live in Phoenix, AZ. and its damn near impossible to keep my home at 70 degrees all summer and still have $$$ to eat (let alone smoke), so I keep it at 75. The problem is that my humidor RH drops to 55-57, and nothing I do raises it. Once the temperatures cool off and I achieve 70 degrees it goes right back up to 68-70. Is this normal/acceptable for 75 degrees?