Hi, I have had a SanRenMu 710 folding knife for just a few days, five or so. I have only carried it with me in my pocket a couple of times and most of the times it has been lying on my bedside table. It has never been under any abnormal humidity condition and I don't have sweaty hands but it shows several spots (freckles, stains) in all its parts: handles, blade and even clip. Did anyone experience the same with this knife? Is that normal with all or almost all stainless steel or just with cheap ones? Can this affect blade sharpness? What can I do to clean it? Is there any method to avoid it? Here you have some pictures: Thank you very much in advance!