The humidifier you keep in your cigar humidor should not have to be changed very often at all. The most common types of devices that you’ll see on the market are sponges and beads. These can be recharged with water or with a mix of water and vegetable glycerin over and over again. Provided that you treat them properly, they should keep your humidor in good shape for many years.
There are some occasions when you will have to change the humidifier. For example, if you happen to use tap water in your humidifier, you’re likely going to need to replace it because of the residue that that tap water will leave within the human to find materials. If your humidifier gets too dried out, you may just want to go buy a new one instead of trying to recondition beads or a sponge that has dried out past the point of being saved.
Most of the time, people who are very finicky about the humidity conditions inside their humidors will change their humidifier devices no more than once per year. If you constantly have problems keeping the levels high enough, however, there may be a few simple solutions you can try before you go ahead and replace the humidifier device altogether.
You can always add a second humidifier device to the cigar box to give it an extra boost in moisture levels. There are devices that are tubes about the size of a cigar that you simply add to the box and which give quite a bit of extra moisture to the interior environment. You might also want to try adding a different mix of water and whatever other substance your humidifier takes to boost the levels a little bit. Remember to check the seal on your box because, if outside air is leaking in, there’s no way that you can keep the humidity levels up to an acceptable percentage.
If all of this fails, don’t forget to check your hygrometer. Sometimes, the device will simply need to be recalibrated. You may be getting some erroneous readings from the device and that may be leading you to believe that you have some sort of problem with your humidor when there is nothing wrong with that at all. The worst-case scenario would be having to re-season the box, which is something that most people never have to do, even if they have their box for many years.How Often Should I Change My Humidor's Humidifier? by David Sabot