I have two bags which I am slowly started noticing this. One is a LV sonatine that I use to go clubbing and my everyday bag the MC alma. I TRY TO KEEP MY HANDS CLEAN....and i dont know wether i should use water to try to get rid of these (but dont want the patina to darken even more) what can I do to get rid of it..??? Is there something I can use to prevent this?!??!?!HelP!!!