I picked up some folex and try that. Nothing. So I got some black Rit dye and mixed up some that looked kinda about the gray color of my carpet. Strained it on with a old cleaner bottle, let it set for about 45mins on the spots. Then cleaned the whole carpet again using the bissell and...
I definitely used the cleaners in the right dilution. There are lines on the bissell machine that indicate exactly how much of each product to use. And I ran over the carpet again and again to make sure I sucked up as much moisture as possible. I will get some folex and try that and then run...
Ford actually has what feels like a rubber membrane between the carpet and the padding. That's a nice feature. I had a jeep once were the floor boards rusted out and stained the carpet from underneath. That sucked but I still drove that jeep for years, loved that car.
Haha.
Ok so I couldn't wait until tomorrow. I got out the flash light and pulled off the trim and looked under the carpet. No rust, no stain, nothing. The padding looks new and so does the metal flooring. Just discolored carpet on top.