I soaked my bracelet in 3-in-1 oil, really worked it into the bracelet and left overnight. Then cleaned it up with soap and a tootbrush, then it was silky smooth.
BTW - The PT SMP I got doesn't like its bracelet cleaning with anything abrasive (they might all be like this). I did it and took off the brushed finish! Looked pretty good but not like original. You can put it back but its a real bugger to do and takes a couple of hours. Learnt my lesson and won't be doing that again
I think all of the crowns are a bit wobbly so don't worry about it, with a bit of calibrating I've got mine down to +- 3 seconds a day so don't need to take out the crown that often