I was cleaning some white limestone tile today. A little picky, but a gentle scrub with a red pad, gekko it off, it should be all good. Put a nuetral cleaner (Ultrachem Cleaner and Conditioner)down, started scrubbing and the solution started turning red where I'd scrubbed. The freaking pad was bleeding, Bad. I stoked up and started rinsing, but there's still a slight pink hue. I'm going back on Thursday, and try a little peroxide on it, but I'm open to suggestions. What ideas do you have?