The problem is only partly the cloth - its mostly the grit that's all over the plastic. I've had good luck using a swifter sister (the poofy blue or yellow thing, not the white cloth) first. I use a meguairs plastic detailer on cotton or MF to get it super clear as soon as it's grit free
Didn't see any mention of a specific iron decon test - try IronX or anything yet? Any notion on how much of the remaining "gunk" might be embedded iron from the pads?
So - let's add to this for a moment.
From time to time I also come across product-supplied sprayers with a pop-out foam setting. I have a couple of 303 bottles like this. I'm surprised that there aren't more options in the "industrial supply" space that have this as an option.
I'd really...