Cleaning an Oros

[raige93]

I know this question has been asked dozens of times... But when cleaning an all copper mod (my authentic Oros) how can I clean the 510 without getting any ketchup (It's cheap and easy, don't judge) on the outside of the top cap? I really enjoy the natural patina and would much prefer to keep it going. Also, I know I should get the threads and the entire switch, but are the lock ring threads something to be concerned about as well(The threads on the lock ring, not the threads on the mod they thread on to) ? Oh, and also, what about the inside of the tube?

Thanks y'all!