White debris on front of cartridge

I had a Clearaudio Charisma II MM cart in my Technics 1200G, and it would get that same residue you mention. I've replaced that with a Hana Umami Red, and that doesn't show, but it might be because of the shape and size of the Clearaudio cartridges are more conducive to picking that up from the surface. 

The technical term for that stuff is “Schmutz “.

Your stylus could be contacting a differ part of the grove that may have mold in it or accumulated crud. try a good wet cleaning ie ultrasonic or vacuum. 

+1 all the above

Thanks all. I do use my VPI 16.5 to clean my records but I haven't looked for a correlation between recently cleaned and older vinyl and that debris accumulation. I'll keep my eye out on that.

At my house it's coke.

Seriously (as opposed to my previous post), the difference you are seeing between the two cartridges accumulating white schmutz is probably only due to some difference or differences in the shape of the cartridge bodies such that one is more prone to accumulate debris where it is immediately visible. If you remove the cartridge that appears "clean" from its headshell and examine it in areas normally hidden from view when in use and under a low power microscope or even grossly, I would wager you will see white stuff there too. I have seen fine white particles on cantilevers mostly, using a microscope, but otherwise I have no idea where the residue might be coming from.