Sorry for my delayed response to the towel question. Last 24 hours having been kind of crazy. Carrie Underwood concert and losing my truck keys...
anyways, if your microfiber are leaving crud behind that usually means they’re a low quality towel and poorly made. and there just gonna keep doing what they’re doing. I only buy microfiber towels from chemical guys. I’m super picky about what touches my paint and what I use to detail with. I have never had any issues with CG towels. But the cheap parts store towels and the online bargain towels always leave crud behind. And usually the leave the towel pattern in the streak marks.... which is really annoying. Lol