for those of u that have high humidity probs or need to lower your RH some, theres a easy way to fix it. im sure some of yall have heard of "Damp Rid", if not its a product that u place in a room to remove/absorbe moisture from the air, thus lowering the RH. well Damp Rid is nothing but calcium chloride. Calcium chloride (CaCl2), also known as 'silica gel', is an ionic compound of calcium and chlorine. It is highly soluble in water and it is deliquescent. It is a salt that is solid at room temperature, and it behaves as a typical ionic halide. It has several common applications such as brine for refrigeration plants, ice and dust control on roads, and in cement. It can be produced directly from limestone, but large amounts are also produced as a by-product of the Solvay process. Because of its hygroscopic nature, it must be kept in tightly-sealed containers. Well Hygroscopy is the ability of a substance to attract water molecules from the surrounding environment through either absorption or adsorption. Hygroscopic substances include honey, glycerin, ethanol, methanol, concentrated sulfuric acid, methamphetamine, and concentrated sodium hydroxide (lye). Calcium chloride is so hygroscopic that it eventually dissolves in the water it absorbs: this property is called deliquescence (see below). Because of their affinity for atmospheric moisture, hygroscopic materials may need to be stored in sealed containers. When added to foods or other materials for the express purpose of maintaining moisture content, such substances are known as humectants. So all u need to do is go to a pool supply store & buy Calcium chloride (its fairly cheap), & put it in heavy duty half gal baggies & hang it up in your room, & it will absorbe the moisture out of the air, & u can tell when its working, b/c water will start to fill the bag as it replaces the Calcium chloride.
yes i use to use it in my dorm back in college. both damp rid, & the diy, worked the same. u can even just put it in a plastic tub & poke holes in lid & place it in room & watch it fill up w/ water.