Calcium hydroxide: I have 2 bottles of Calcium Hydroxide that are moist. Can it be dried out? Or is it no good or Ok as is? Also how do I stop the chemicals from becoming moist?

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Calcium hydroxide: I have 2 bottles of Calcium Hydroxide that are moist. Can it be dried out? Or is it no good or Ok as is? Also how do I stop the chemicals from becoming moist?