bigappetite wrote:thanks to all. great information. is there anyway to control it? i am located in northeast Georgia, US and it is very humid here.
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Wet salt will control (but not very powerfully) towards 75%.
The cooling elements in a fridge will knock out some moisture as condensation (potentially frost) - hence most fridges run pretty dry.
Heating the air in an enclosed space reduces its RH but doesn't change the total moisture content.
Running a heater (like a 15w light bulb) inside a fridge causes the cooler to operate more and so knock out more moisture.
You can raise the humidity with a bowl of water... or an ultrasonic fogger or a plant mister spray, or...
You can buy humidity meters (hygrometers) quite cheaply. (Pet shops, eBay...) Its a function on many pretty cheap digital thermometers - but beware that it is very rare on the remote probes for such items.
Hygrostats, humidity controlled switches, are available, but cost rather more than thermostat switches.