D'Addario Guitar Humidifier System - Humidipak Maintain Kit - Automatic Humidity Control System - Maintenance-Free, Two-Way Humidity Control System For Guitars

So simple to use and works perfect, preventing warpage or cracks for my guitar drying out keeps the humidity and a perfect 51%, plus or minus 5% in a wood case it may consume one packet just so that the case itself becomes a microenvironment humidified so you may need to buy some replacement packets and after the case is humidified you probably go through one packet every month

I like the product a lot. The pack works very well and is easy to use. There was a defect in the most recent order though. The new box of humidity control (now called Humidipak Maintain, I guess) pouches had no pockets at all, just the black material. I simply reused the old pouches but I hope the manufacturer sees this so they can look into quality control.

I put humidity monitors in my guitar cases to see how this product works. "Restore", 50% humidity. "Maintain", 45 to 46% humidity. Humidities took a little over a day to stabilize and haven't changed since I am put them in my cases a week ago. Amazing!

I purchase several things on Amazon and was giving pretty in-depth reviews. From this point on, here's the new agenda…. if it works as advertised, is well made, meets or exceeds the description, is a value, and arrives in a fair amount of time, it will get a "star rating" equal to what my expectations were/are. If it doesn't meet these criteria, then I will most definitely and descriptively tell the short comings of the products and you as a consumer will not have to go through the trouble of buying the product without some background knowledge. If the sell pulls that item and relists under another description, I will put the exact same review on the seller's feedback page. Sellers have done this a couple of times in the past, and I was true to my word then as well as now. DR

This Humidification System is effective. However, I should give this NO stars for goofing around too much: this is the sixth revision of the Humipak, according to my luthier. The previous revision was total disaster. I bought one, and could not reinstall the bag of humidifying resin on the spine (like a report cover spine.) And I was not alone in this, even the luthier said he couldn't and he's a strong guy and I'm a senior citizen woman. So it wasn't just me. So IF YOU HAD the previous rev with the spine you slid (maybe, maybe not) across the bag, this is NOT like that anymore. The new revision has saddlebags attached by a ribbon handle. You slip the humipak inside the bags, no closure and stuff it inside your soundhole. (It barely fits in mine, I have a classical guitar. (An acoustic steel guitar will fit it better, they tend to have larger soundholes.) There is a third bag for the headstock area of your guitar case. Does it work? Yeah it works.I know it works because I ran a test to see if it works (once an engineer, always an engineer.) And it works better than the sponge-type containers that you moisten (daily) and put in the soundhole. Those do not diffuse the water evenly into the guitar body. I know this because my guitar got overly dry EVEN WITH constant use of that device. I ended up taking it in for repair and rehumidification and meanwhile, the second guitar at home was given this new humidifier (because you need a spare, you can see why: the one is at the shop and you're playing the other.) I ran an experiment on the humidification. I purchased a D'Addario Humiditrak - Bluetooth Humidity and Temperature Sensor to track the rehumification and steamed up my office at home with a cool mist humidifier going 24/7. While the Humiditrak is not a super sensitive device, I'm told it's within 3% and it tracked an immediate increase in humidity. The sponge device stayed at a much lower level of humidification. The guitar got up to 45% humidity and then started to drop again when I turned off the humidifier in the room, so now I know: 1. Use the Humidipak 2. Humidify the room you keep the guitar in, and play in constantly. I use a cool mist humidifer. Distilled water will keep the white dust down, or use the kind that has a filter to remove salts in water. 3. keep case closed and keep guitar in case UNLESS playing it. 4. track humidity and temperature 5. check packs for "crunchiness." Crunchy means it's dehydrated. You need to buy Planet Waves Humidipak replacements. Not cheap (there is some lore about rehydrating in a wet sponge equipped sealed plasticware tub with the old packs on the side not touching the sponge, but I have not tried this. You can find this method here and there on the internet. A pro guitarist friend of mine does it. If I were to try it, I'd run my humidification level check again because even though it might feel soft again (swollen with water) the humidification might not be effective. Stay tuned. One star off for bad designers who thought that last version was usable. Wow. Just wow. But this version is good and it is effective. I have proof.

Perfect for keeping my guitars at the right humidity level. Just pop the packs in the case and forget about it. Peace of mind for my instruments.

Just make sure your guitar is in a fairly air-tight case. With that established, you're good to go -- this is great, easy to use, and although a bit on the expensive side for a humidification gadget, it absolutely does the job.

This is a GREAT product (that could just benefit from somewhat better directions)! I use them with both guitars (essentially as intended) and my solid wood tenor ukulele. For the uke, with its smaller soundhole, I slip one of the cloth bags that holds a single Humidipak (designed to lay in a case under an instument's neck) between the 4 strings and the soundhole. I don't actually try to cram the guitar-hole-sized Humidipak into the uke's little soundhole, as that's neither necessary nor prudent, given that Humidipaks harden as their moisture becomes depleted --which might make it difficult to get a dried out Humidipak out. I love that these things are fairly foolproof, as I didn't like the idea of potentially damaging my solid wood Martin guitar by water dripped from a competing product. The main criticisms I've seen of these are (1) price and (2) length of use before disposal. But the online pricing is quite good, especially factoring in the fact that these are RECHARGEABLE not just disposeable. They balance humidity, right? So when they dry out, simply temporarily store them in a humid environment and... voila, good as new! My first attempt at this worked wonderfully: (1) partly fill the bottom of a relatively large, air-tight food storage container with tap water; (2) place a relatively heavy but smaller container such as a stoneware bowl that won't float in the water; (3) place some (I did 3 at a time) dried out Humidipaks in the stoneware bowl (rather than throwing them away and buying new ones); (4) close the air-tight lid on the large food storage container; and (5) wait until the Humidipaks become soft and fluid (like new) again! So perhaps buy some replacement Humidipaks so that you can be recharging some old dry ones while other moist ones are slowly discharging in your instrument case(s). That's what I'm doing, and thus far I'm 100% satisfied with the ONE-TIME up-front purchase costs (assuming I can recharge these indefinitely?). Furthermore, for the rare few who live in overly humid environments, you could use these as DE-humidifiers. Just don't make the mistake some have made in thinking that you can benefit from placing a fully moist new Humidipak in your instrument case to absorb excess moisture. First somehow DRY OUT some Humidipaks and then place the hard, dry Humidipaks (that many would throw away as trash) in your instrument case to absorb the excess moisture. Repeat as necessary...