The tempering process (horizontal) is leaving white marks (haze) on the flatter side of patterned glass (aquatex, rain). We are not having a problem with pattern 62 since its underside is completely flat but the others do not have a completely flat side. The flatter side is placed down for the process and the rollers are scorching the "convex teets" (for lack of proper/better terminology). We have attempted raising the convection air supply, wave speed in furnace and drastically lower bottom temperatures, all to no avail. Any suggestions or would our only choice be to order from a different supplier with hopes for a much flatter side?