If you find blue/green spots on your cigars that leave a stain when you brush them off, the spots are probably mold. Mold is a damaging fungus that results from storing cigars in too high humidity and will ruin the taste of your cigars.
Here's what to do: as soon as you find the mold separate the affected cigars from the others and gently wipe your humidor using a clean cotton towel with a bit of distilled water. Do not wet the humidor or it will ruin the wood. Leave the humidor open to air dry. Leave your cigars outside the humidor for a few days until you are sure that the mold growth has stopped. It is important to bring down the humidity inside the humidor before placing the cigars in it again.
The cigars may not be ruined if you have noticed the mold early. If the mold appears to be just on the surface of the wrapper and has not spread to the interior, the taste may not be affected.
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