De-humidifying & proper humidity control br br Humidity advises video br br 1) br You should have a hygrometer (a simple one like this: br (*do not leave this sensor inside the case, it should be outside in the room you keep the guitar) br br br br and only if it is under 40 humidity place (generally in winter time) the simplest humidifier in the head of the guitar case re-filling it with water every 2 or 3 days. br br 2) br Here is the link for the humidifier: br br br br The difference between Classical and Flamenco guitars br br br ............. br br ^Ex.1 00:14 solo 1 br Ex.2 11:24 solo 2 br Ex.3 01:01 topic br br ........ br br Nice link by Taylor Guitars br br br .........