Every morning when I start the car to warm up for a minute or two , the belts chirp. It has become quite annoying. How do you determine the proper belt tension. I need to tighten them but do not want to get them too tight for fear of damage. I have read the SE-R.net page about the procedure but it does not mention proper tension. Also, is ther any reason why the belts squeak when there is moisture present and not when it is a dry morning?