Re: Tuning Problem Warm Weather
I live in the tropics as well, and you have to be careful with keeping the guitars in a fairly constant temperature as much as possible. Having them in an airconditioned bedroom for example, is not good as the difference between night time (aircond on) and day time (aircond off) is extreme and can cause guitars to have tuning and other problems.
I find keeping them in cases inside a cupboard is good, because within that little mini environment the temperature tends to stay fairly constant. I've taken my guitars out of their cases in the middle of a hot afternoon and they are still cool to the touch.
I keep my guitars that I am not constantly playing in the spare room, within their cases inside a cupboard, and I keep my main playing guitar at the time on a stand in the living room where the temperature is matched with the environment and fairly constant.