In this episode of Uke Minutes, Aldrine teaches you how to make your own Ukulele Case Humidifier. The ukulele like all wooden instruments is susceptible to warping due to dry air. This quick homemade humidifier should solve a lot of problems if you live in dryer regions. Just be sure to keep that foam wet and replace it every month or so.

Be sure to read the full article on Humidifiers found here.

What Should I Learn Next?
"Ukulele Accessories"
"Diy Ukulele Wall Hanger"


  1. I have an all solid wood ukulele. It gets pretty cold in Kansas during the winter and our furnace dries the air below 40% humidity. I’ve had my uke for at least 8 years and I see now I have a crack on the back. I have bought a humidifier that fits between the stings. My question is; when I put the humidifier into my uke, do I need to store it in it’s case to keep the humidity high enough or can I leave it on display and not in the case?

    1. Hey Lyle, thanks for being a part of the Underground! For instrument humidifiers like the one you’re using, in order to be effective, you need to load the humidifier and store the instrument in its case. Most instrument humidifiers don’t have an active element to them (just add water and it works passively by evaporation/diffusion), so it will really only affect the humidity inside your ukulele case. If you like keeping your ukulele out on display (having it easily accessible tends to promote more playing and practice!), use a powered room humidifier and monitor the humidity in the room. As for the crack, just be careful while handling it, but unless it dramatically affects the sound / stability / playability of your ukulele, cracks are completely fine (in fact, some of the best sounding ukes have cracks in them). Hope that helps! Take care & if you need anything else, just send a message

  2. My ukulele is made in California and I’ve heard that if it wasn’t made in Hawaii then it doesn’t need a humidifier, is this true? Please Help!!!

    1. Hey Faith!

      Thanks for being a part of the Underground – that’s a great question. Actually, it doesn’t matter where your ukulele is made, if it is made out of wood, it should be kept at a specific humidity (the optimal humidity is around 40-50%). So if you check your local weather report and it says that the current humidity is below 40%, you should probably put a humidifier in your ukulele case. Low humidity can affect any and all wood instruments and can lead to exposed fret ends, changes in playability, or even separation of the wood pieces and cracking (if the humidity is lower than 25% you definitely need a humidifier).

      The misconception may come from the fact that ukuleles made in Hawaii tend to be made out of koa wood, which is generally a softer wood (and more expensive), so people tend to take more care of controlling the humidity for these because they’re more susceptible to cracking at low humidity (and more expensive to repair or replace). However, ALL wood is susceptible to changes in humidity, so if you live in an area that’s naturally dry, definitely get a humidifier to protect and extend the life of your instrument.

      Hope that helps and if you have any other questions, we’re always here for you!

      -Aaron (& the UU Staff)

  3. I have to say this as an RN who has worked in an emergency room….what am I'm going to say?

    I'm a fan of A.G., but I'm also a fan of people's hands.

  4. Hi Aldrine, iv just bought a ukulele and i live in central England so its not as hot as Hawaii.
    I was checking out some old minutes n came accross this one. Should i worry about a humidifier??
    Sid G

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