Ok this is the kind of question a guy would know but not necessarily a girl. Threads on my ego twist. I bought my first and bought many tanks and filled each with a fav juice, I twisted and changed tanks so much, sat at my desk and went through my whole box hourly. 3-4 weeks down the line and my threads seem gunked up or something so I tried to clean them up with alcohol and a brush. worked for while. Bought a new Ego twist and it turns so well-threads are in great shape. Old ego twist not so much. Do I need to oil them? and if so what would I use? Is it possible I stripped off the finish with mutiple scrubbing with brush?