I got my 1Z order today from Autogeek.com, including the Blitz cleaner. I bought it for the interior, but it claims to be all purpose, usable on virtually anything. I put it in a spray bottle and followed the instructions, using a 1:20 ratio of product to water. This stuff is going to last forever.
I vacuumed the interior, just like you would if you were cleaning carpets, and took a before photo of the driver side door. Why this door? It looked the dirtiest.
I even took a photo of the towel for a true before and after test. That's not included and I'll get to that in a minute. The Blitz did a great job in removing the dusty schmutz from the armrest. It smelled like nasty carpet cleaner, so I made a point of getting it all off. Here's the after photo:
What was surprising about this was how little dirt was on the towel. Where I really saw dirt was in cleaning the rest of the car, where the passengers sat. My center armrest, door armrest and seat were relatively clean, probably from me constantly interacting with it. It was the rest of the cloth interior that was dirty, probably more dust than anything else.
Also, the two minor stains that my wife's organic herbs and spices cleaner couldn't remove were completely erased, almost before wiping it off. I think eating organic is fantastic, but if you want something cleaned or a toilet unstopped, go with the nastiest stuff you can find. Then go wash your towels in a capful of the stuff.