Brake fluid in power steering
I have put brake fluid in the power steering reservoir and drove it (YES I F*#KED UP). Drove for half and hour and then a groaning noise started whenever I accelerated and turned corners.
When I got home I tried to remove as much fluid as I could from the reservoir and turned the wheels side to side for more fluid to come out. Filled it up with Dexron 3 auto fluid, lifted the front wheels up and bled the fluid until no noise.
Went to use the car later and the noise was back and little bubbles were present in the reservoir as soon as I started it. Left the car overnight and topped it up in the morning and car worked fine, 10 minutes of driving and the noise was back. I have tried for the last half an hour to bleed the system again but no luck as the noise is still there and I am frustrated.
How can I be sure all the brake fluid is gone or have I done something to the power steering motor? I cannot see any visible leaks and there was no problems before the brake fluid.