I bought one on the suggestion of the previous owner of our Black 96 SVT Cobra. He pampered the car and it was a low miles garage queen. So I believed him. I followed the instructions and let it sit on a newspaper over night to remove oils. Despite that everytime we used it there were a line of streaks left behind. Looked like oil or wax. My paint also scratches if you look at it wrong, so I stopped. Thing is whenever I go to a show there are owners of much more expensive cars than mine using them. And on Chasing Classic Cars on Velocity when the show video from Pebble Beach Concours I see people with very expensive classics and exotics using them. Perhaps it's my paint or I need to really just glide it with less pressure. So I use Meguiar's QT and MF towels. Or if more than light dust I wash. I need to learn more about wash less or rinseless cleaning. Dave.