I hadn't played my ATK300 for a few days and the last couple days have been 100+ degrees. When I picked it up today I noticed the action was ridiculously high. It reminded me of an upright. I looked down the neck and there was a definite bow that was not there before. I'm assuming the hot weather did this. Now I'm pretty sure I have to adjust the truss rod to fix it, but will it go back to normal relief after the weather cools off? Should I just wait it out? Or will it stay like this until I adjust the truss rod? And how do I adjust the truss rod? Do I have to take the strings off first? How much do I need to adjust it by? I'd say the action is about 1.5-2mm higher now.