I am in South Louisiana and have had pins rust. My sewing room AC/Heater is not on unless I am in there sewing. I bought a humidity gauge at WM for less than $10. Imagine my surprise when the first time I used it I found my humidity to be 76%. I bought a dehumidifier because leaving my AC on wasn't bringing the percentage down below 50%. Now I just use the dehumidifier. I made sure and got one that pumped the water down a drain. I knew I didn't want to be emptying a bucket all the time.