Best Guitar Humidifier

You may not have been aware of this, but your guitar needs humidity. Anything made of wood is dependent on the moisture content of its environment, and so is your guitar. If your guitar dries out too much, playing it will become more difficult and it won’t sound right. Worst case scenario—it will begin to come apart.

Making sure your guitar has the right humidity levels is therefore crucial. You can get a hygrometer to check the humidity levels but it’s best to start with a guitar humidifier. That way, you ensure your guitar never excessively dries out.

This guide is meant to introduce you to guitar humidifiers, explain what choices are available, and provide you with a list of the best guitar humidifiers on the market.

Guitar humidifier types

There are two main types of guitar humidifiers: sound hole humidifiers, and guitar case humidifiers. Both are good options, and your choice will depend on how often you use your guitar and where you mostly store it. As the names suggest, the soundhole humidifier fits into the soundhole of an acoustic guitar, while the case humidifier goes into the hard case of an acoustic or electric guitar. Our list features 5 different soundhole humidifiers.

Let’s look at our list of best guitar humidifiers.

Music Nomad MN300 Humitar Acoustic Guitar Humidifier

This humidifier is super easy to use, low maintenance, and it still keeps your guitar in great shape.

This is a soundhole humidifier. You get a plastic casing holding a non-drip sponge, and you then slide the humidifier into the soundhole between two center strings. The casing has a lid. Open it and remove the sponge. Wet it with distilled water and place it back into the humidifier casing. It will then work to keep your acoustic guitar at the right moisture level.

Checking it is also a cinch. Simply open the lid, and if the sponge is still wet, you can leave it, whereas if the sponges have hardened, you need to wet it again. And that’s how easy and convenient it is.


  • Easy to use and low maintenance
  • Non-drip sponge
  • Innovative Humid-i-Bar sponge holds water 10 times its weight


  • Spreads the strings apart considerably

D’Addario Acoustic Guitar Humidifier

Like the first humidifier, this is a simple soundhole humidifier, and it may well be one of the least expensive, which makes it a value pick for the best guitar humidifier.

It works along the same lines as the previous humidifier, however, the sponge is of lesser quality. Because it holds less water, you are going to have to check it more frequently. It is also a non-drip sponge that evenly releases moisture to keep your guitar humidified.

It will maintain your guitar in good shape, as long as you are prepared to put in a little extra effort.

This guitar humidifier is great value for money, and may be the best guitar humidifier for you if you are on a tight budget.


  • Value for money
  • Easy to use
  • Made by Planet Waves (named after the classic Bob Dylan album)


  • Sponge doesn’t hold much water

Oasis OH-1 Guitar Humidifier

This humidifier is a little different. Instead of featuring a sponge like the previous two, this one holds the water in a gel. This gel can absorb 500 times more water than conventional sponges, so it does a good job of keeping your guitar from drying out for a very long time.

On purchase, you get a syringe to fill the gel with water.

A couple of years into its use, you’ll have to replace the gel, but that is hardly a big issue. The main point here is that it works effectively. What’s more, it is easy to use. Just insert it between the 3rd and 4th string. Check it regularly and when you notice it shriveling up, just add more water.

The price point of this humidifier is above average, but most users agree that’s worth it.


  • Super absorbent gel humidifier
  • Absorbs 500 times more water than most sponges
  • Easy to use
  • Doesn’t drip


  • Expensive
  • You need to replace the gel after prolonged use

Kyser Humidifier for Acoustic Guitars

Shaped like a disc, this humidifier is a little different again. You seat it into the soundhole and let it do its job. Two sizes are available for different guitar types.

Using it is easy, but because this humidifier doesn’t contain a removable sponge, you need to soak it in distilled water before inserting it. Meticulous drying of the disc after immersion is essential to keep water from dripping into your guitar.

All in all, this humidifier does a good job, although it’s a bit trickier to use. The price point is acceptable, and most users are satisfied with its performance.


  • Available in two sizes for a perfect fit
  • No fiddling with sponges
  • Reasonable price


  • Water may drip into the guitar if not careful
  • Awkward to insert and remove

MusicVow Acoustic Guitar Humidifier

This is another soundhole humidifier, similar to the first two on our best guitar humidifiers list. The sponge is so absorbent in this one that you can forget about it for a whole week before you have to refill it.

Using it is easy. Wet the sponge, insert it into the casing and put it into your guitar. Dripping is no issue here, as the sponge is of superior quality.

The one drawback of this humidifier is how far you have to stretch the strings apart to insert it. A lot of people feel it’s just too much and simply don’t like using it for this reason.


  • Super absorbent sponge
  • No dripping issues
  • You only need to check it once a week


  • You need to pull the strings far apart to insert it into the soundhole


You now know what choices you have, and your final decision will depend mostly on your budget. We have no trouble giving the best guitar humidifier title to the Oasis because it absorbs so much more water. It’s easy to use and will maintain the humidity in your guitar without much effort. Even if it is the most expensive, we still consider it to be the best guitar humidifier. After all, your guitar deserves the best.