Ok so this has been driving me crazy, I feel dumb asking about it. Belts keep slipping and can't get them to stop. Seems like it only happens when my cars sits for an extended period of time, especially in the sun. Tightened the belts, used the belt dressing spray. The belts are not old by any means, were new back in December. After inspecting the belts they seem to be in good condition. Any ideas of what could be causing this obnoxious sound?