Lol, I've taken a magic eraser to it a few times. The shaft I like that dirty used look/feel to it, but I have been needing to clean the ferrule a bit.
OK, well, it looks to me like you're definitely working harder at the table than you have to because of that tip. Maybe you should revisit why you don't like the feel of a newer tip. Is it just an old habit? Is it a visual thing? Some players like to bring the tip extremely close to the cb in their setup and may find themselves fouling the cb in their setup with a new tip due to the extra height. But that doesn't mean you can't adjust.
I think it's crazy not to utilize the benefits that a new tip can give you. You have to ask yourself whether your habit is logical or just a habit that you fell into.