D'Addario Accessories Small Instrument Humidifier

I purchased a few of these humidifiers for my acoustic guitar and ukulele. They have done great and helped keep my instruments at around 45% RH in a pretty dry desert climate that stays around 6-20% humidity year round. I was pleasantly surprised by this humidifier. It is easy to use, the plastic is sturdy, easy to refill and it’s small enough for the pocket of a tenor ukulele case. I also use one in the case of an acoustic guitar as well. Design is good and I have not encountered leaks or other issues with this humidifier. As long as you do not absolutely drench the sponge you can get it pretty saturated without problems. Another review had said the humidifier doesn’t come with a sponge so I wasn’t sure. The package does come with a sponge but it may be easy to miss since the sponge is dried out and squished to fit in the box. All you have to do is run it under some water and it will expand in a pretty large sponge that fills the entire humidifier. Read the instructions and you’ll see. Overall I am happy with this purchase for <$10 it can’t be beat and is a lot cheaper than constantly replacing humidipaks or other chemical humidifiers, especially if you get more than one.

This is a great way to keep a smaller wooden instrument hydrated in dry conditions. If you’re wary of using a chemical hydration packet, this is an excellent alternative. Easy to use, just remember to use distilled water and thoroughly wring out the sponge. Get some bigger velcro if you plan to affix it semipermanently in your case. Just don’t put it in the little accessory compartment in your case — it won’t be of any help there.

These work as advertised.

For hollow-body guitars I use the D'Addario pouch system exclusively. But for a couple solid-body electrics I thought to try these (to help protect the fretboards). These little guys probably do boost the in-case humidity, because whenever I check them, they could use a top-up of distilled water. Experience has led me to the conclusion that I might as well use the D'Addario pouch systems here also with the electrics (no sound hole to emplace them, but plenty of room in the case). I'd rather have spare humidity capacity this coming winter. Since the pouches for for 49%, there is no problem with over-humidifying.

I think it works because my mandoline is intact and I live in a humid place

The top pops off, ended up taping it closed. I thought about sending it back, but didn't want to go thru the hassle of returning it.

I check the sponge about once a week and it keeps my ukulele case up to 45% humidity which is in the perfect range for a stringed instrument. My Las Vegas home is now at 20% humidity, which is actually pretty good for here. It does not leak, is simple to use, and protects my instrument. An inexpensive solution to what could be a very expensive problem.

Is exactly what I was looking for to keep my electric guitars with the right humidity