I'm going to be completely honest with you: I don't grease my press-fit bottom brackets. I haven't done it since I was 13 years old. I bought my first road bike, and I didn't know much about bicycles at all. But I did know that most road bikes have press-fit bottom brackets, which means they don't use threaded bottom brackets, so I assumed that meant I didn't have to grease the press-fit bottom bracket. I assumed wrong.