Power Steering Noise

Look at the angled parts of the belt that contact the pulley surfaces. Are they shiny and crystalized looking? I bet they are. They harden over time usually before the belt wears out and there's no amount of belt dressing, jisim, or anything else you can put on them to make them quiet. I'd also recommend the non cogged, solid type belt.

...and don't be a cheap ***. Get a good name brand.