hi guys,

today after 5 years playing at my home, I saw that it looks like it is needed to maintain the guitars with humidity, so my question to you is:

1) is it true? If my house humidity is below 40% (right now is 18%) it could danger my accoustic and clasical guitar?

2) if this is indeed true, which method do you recomend, looking in amazon I see mainly two types:

this

https://www.amazon.com/gp/product/B00DKAQGTG/ref=as_li_tl?ie=UTF8&tag=lucajr-20&camp=1789&creative=9325&linkCode=as2&creativeASIN=B00DKAQGTG&linkId=4fa157b12c0225655e0cc30a813b53f0

and

this

https://www.amazon.com/gp/product/B004GLHF4I/ref=as_li_tl?ie=UTF8&tag=lucajr-20&camp=1789&creative=9325&linkCode=as2&creativeASIN=B004GLHF4I&linkId=60b08c54dde120a928c1e31ba334c63d

finnaly, do you use any method to measure the humidity in the guitar?

thank you in advance!

cheers

Charles