I just don't want to mix them because I feel like it would make me less clean.
Relatedly, what's the best way I can follow the Patrick Bateman skincare routine as a simplified version that's actually practical to follow and contains the most important steps?
Do you want to use different towels for the different parts of you even right after showering? Or only so that a different one for after shovering, another for your hands for when you just washed hands, and another for the face when you just washed your face?
I don't think the former is normal, but the latter is. A different one for showring and just washing your hands is good to have I think, and if you have got oily skin then a third one for your face is also completely understandable.