Instructions
Check the wrapper of your cigar carefully. If it has cracked and split, the cigar can't be salvaged. As long as wrapper is intact, moisture can be carefully re-introduced.
Create a makeshift humidor for the cigar with a plastic bag or food-storage container. Wet a small piece of sponge with distilled water and place it inside the container with a hygrometer, a device that measures humidity. When the hygrometer reads 50-percent humidity, place the cigar into the container ensuring that the cigar doesn't touch the sponge.
Increase the humidity slowly, about 3 percent each week, by adding one drop of water at a time to the sponge and verifying the humidity level before putting the cigar back into the container.
Transfer the cigar to your regular humidor once it has reached the standard 70-percent humidity desired for storage.