yeah. you're welcome. there are quite some basics every guitarists should know to protect their guitars. We should not totally detuned the guitar too as sudden change of tension can affect the guitar longevity too. whenever i replace strings, i will always do it one after another, but not removing all.

Really hope we can continue to make this thread active again

am no expert here. But these have been the info I learned in the years. So not sure which is right which is wrong. But I think it makes sense to me by removing all the strings out of sudden will make the guitar neck "move" too much? And by detuning each strings about 2 to 3 turns every time right after playing in order release some tension, I learned this from Sakurai Kohno website. I think it makes a little sense to me by having the tension strength in between to reduce stress to the guitar neck in long run?? I'm really not sure about all this, but I've been practising this since, just to be safe.

But I can confirm the humidity factor is extremely crucial to the guitar!!! My earlier Spanish guitar was badly damage when I brought it with me to Scotland for 2 years. In Malaysia, the average humidity can be sky high at 70 -80%. Yet in Scotland, and due to winter in-door heater, the room humidity can be as low as 30%. My guitar was badly damage and I've learn a huge huge lesson from this. If the guitar stay in the same country, it should not be a much problem. But do aware that above 70% of humidity can badly affect some guitars depends on the origin of the wood, where the guitar was made and so on. And never put the guitar in the car, leaving it in the car under the hot sun!!

i rarely do anything to my guitar about humidity. I don't think it is much of a problem. If you put in an air conditioned room, the humidity would be quite perfect. Just don't put the guitar at a place with very warm and lack of air flow. Such place during rainy days humidity can raise up above 80% in Malaysia. As long as the guitar in at around the same airy place in Malaysia, I think it is more than fine.