Like Ds01C5, I'm not a Klasse user, but a Zaino addict. First time I used Z2, then followed with Z6, I also got lots of smudges and streaks from the Z6. Kept trying to use more of the QD ... then fresh MF ... then fresh cotton towel, but no improvement. Finally I figured out the problem: I was using too doggone much pressure -- working myself to death. Since I've "lightened up," the problem hasn't recurred. Don't know if that will help in your case ...