1996 Lexus ES 300 power steering leak

Hi guys,

I slowly noticed a small spot on my driveway that I guess has been slowly enlarging to about 4" in diameter over the last 3 months. I bought the car 3 months ago (Oct 20, 2008).

The power steering fluid resivoir is down about 1/8th of an inch.

I felt slightly reddish substance on the driveway and decided the small leak was directly underneath the power steering fluid resivoir on the undercarriage and driveway.

I want to use a "Stop Leak" power steering fluid product, but read that the seals expand when you use it, and that's how it stops (or slows) the leak.

Will I "really" hurt my car if I use this kind of product?

I'm on disability and can't afford a serious ($) repair.

Thanks for your help!