It appears my car has been losing power steering fluid through a hole on the powering steering fluid reservoir cap. There is a small hole located at the side of the cap where your hand fits to turn the cap and it looks like a vent. The ps fluid reservoir has been needing refilled every couple of days and some of the fluid has made it onto the engine cover and surrounding area, leading me to believe it came from this vented cap. Also, when I have removed the cap after driving, the fluid seems bubbly and I have noticed a mist inside the reservoir almost like steam. Does anyone have any similiar experience or know about the operation of the cap? Thanks.