Wiping With MicroFiber Cloth: Cleaning?

You might not be able to tell but I guarantee ya they can tell. Here's the thing. Harsh/improper cleaning is a matter of degree. And in the last 15 years the TPGs have become quite lenient about it. They routinely give clean grades to coins they previously never would have cleanly graded before. So it's not that they can't tell, they can absolutely tell. All they're doing is giving their customers what they want - clean grades. And grades higher than the coin deserves.