Power steering frustration

Power steering can be a pain. My wife’s Chrysler Town & Country was making horrible power steering noise. Replaced the reservoir & it went away for awhile. Then it came back. Went to a dealer near me & the told me the rack & pinion and pump needed replaced. Big $$$.

Went to another dealer & the service advisor told me to warm it up good and then fill it to the top, ignoring the fill marks. I did that and the noise went away. He told me that the fluid is so turbulent that air gets mixed in and that is what causes the noise.