Today I figure I would clean the PCB where the buttons lay and Ive gone into the system to make sure no major corrosion has happened, noticed that there was just a slight build up on one of the button tabs. 
Q: Whats the best solution to use to insure long life of my contacts? 
I am doing this as sometimes button II doesn't work at first until I turbo the button and then bring it down to no turbo. 
Q: Is there any recommendation on how to clean and make sure the turbo pins are well off? 
Thanks for the advice and sorry if this would be a duplicate but I searched and couldn't find anything like this.