need some help to fix a irritating squeal in my brakes. this has been going on for awhile now. i was told that it would go away after time, it hasn't and it's really driving me nuts. when the brakes are warm and i softly apply the brakes it creates a loud squeal. this does not happen if i press the brakes a little harder. any ideas on what it is and what to do about it. do i need new pads, if so oem or aftermarket?