[Limestone-Cowboy]

Don't know if it's still available, but Engineers suppliers used to sell aerosol cans of "Belt Dressing". I've no idea whats in the spray, but you spray it on pulleys and it leaves the surface 'tacky' so the belt doesn't slip. I've had a can in my garage for a year or three now, and although our Hyundai's have not needed any of this treatment, I did have occasion to use it on my previous car (Discovery), and it certainly stops the squealing from belts.
LC.