A good guitar-player is not just playing well but also know how to keep in good condition for both quality sounds and nice finish. When you spend lot of money for best acoustic guitar you should has knowledge about care and maintenance guitar.
The guitar is not just an instrument it is a good friend. So let treat it well.
Climatic Conditions: Most of high-quality-guitar made by solid woods. As you known, woods are more often effected by climate, specially are temperature and humidity. For guitars, the good humidity is about 60%. Some places has high humidity, you should put some silica gel bag along with guitar into case or put your guitar in air-conditioned rooms.
Some guitars get high humidity that cause distortions such as light-curved neck but when put it in suitable humidity it will restore good shape. (note: too high humidity, the distortions will large and your guitar can’t restore). The high temperature is not good for guitar too, at 50oC the glue which connecting your guitar will be melt. So do not put guitar at too hot places such as outdoor, fireplace, stove, etc.