First of all welcome to the forum. From your pictures & description it looks like your guitar may need a neck reset. Rehumidifying while a good idea won't correct the need for a neck reset. I'd suggest taking it to a good guitar repair person and have them check it out. If you let us know where you're located I'm sure someone can recommend a good guitar tech. If it hasn't been played for 18 years getting it completely checked out for any other possible issues is the first thing I'd do.
Regards,
Ed
|