Need a favor from those with SBM and power steering.

This morning I followed some of your suggestions. I removed the PS belt and filed down the edges. I also ran the file across the pulley on both sides of the groove. Fired it up and still screech starting at 2300rpm. I then wet down the belt and pulley with water. Sound goes away until water is flung off or dries in a few seconds. This is a gates belt and only has about 1000 miles on it. I replaced it after figuring it may be a belt issue. The old belts I removed do the same. ARGH!!!!!