If your copic markers are failing or not working as well as they should, the best thing to do is to buy a new marker or a refill pack. However, if that isn't an option at the time, you can try to revive it. There are a few different ways to revive copic markers; however, the way we've found to be the most effective is this: Begin by pulling out the nib of the marker. It works best if you use tweezers, but you may find your own way. Once it's out, get some kind of alcohol product; we prefer rubbing alcohol, but denatured would likely work, as well. If you have a needleless syringe, use it for this next part. If not, you can use a pipette or a clean eye dropper. Using your chosen tool, drop a couple drops of the alcohol into the hole from where you pulled the nib. Return the nib to its spot and shake the pen thoroughly. Place the pen in a safe place overnight. By the morning, it should work almost as good as new.