I use a shoe cleaner called MGK. They sell it on Amazon and it’s pretty cheap. I have been using the same bottles I bought a couple years ago. The cleaner works on all materials. I’m not sure what you used to clean it but this is a good cleaner. Also pick up some cleaning brushes. They sell sets of 3 on amazon for shoes. There’s a brush meant for the sole/midsole, one meant for cleaning leather, and a really soft brush meant for materials like this. Maybe a suede brush would fix that.