12 string sink hole

[love2play21]

I saw a 2000 12 string that the last few frets sank down a few cm into the sound hole.  I was then researching it and it seems that a few people who have written reviews talked about how their 17-20 frets angled down in the soundhole a bit but it did not affect anything just the looks obviously since the top is not perfectly flat.  Cause being lack of humidity, but does this have any really bad effects, your thoughts are appriciated.

[Calvin]

Humidify your guitar.

Long term dryness will cause your guitar to crack in various places.

[love2play21]

havent bought it yet just wondering if i should get it and how much the sink would hurt in the future

[Calvin]

a temporaray solution would be to...

take a glad sandwich bag (cut small holes on bottom), put some DAMP (not dripping wet) paper towels in it.  Hand the bag on the strings.  you may have to do it for a few days.  If your actions correct itself, it means you have a dry guitar and you need a humidifier.

Do you absolutely need to get a humidifier?  Well, that's kind of like asking "should I wash road salt off of my car" or "should I pay my visa bill on time".  I dont know, do you want to???