Works For Me!

I have purchased several high-end reps and every now and then I will get one where the crown feels "scratchy" when screwing it down. My solution (and this sounds crazy) but I put just a TINY squirt of WD-40 on the barrel threads, let the excess, if any, drop off and then take a blow dryer to the threads themselves then screw and unscrew the crown a couple of times. Works like magic and no problems so far. Anyway, just a suggestion.