I'm having a problem with a power steering squeal on my 2011 Subaru Impreza. It started when the temps starting dropping. I've replaced the O-ring and the hose clamp to it. I have also removed as much of the fluid as I could and replaced with new. I'm having no air/bubbles in the reservoir when the wheel is turned to lock and lock. But when the temps drop below 35 outside the more of a squeal I get. I've also sprayed the belt with a small amount of belt dressing also. Any and all help would be greatly appreciated!