The winder on my automatic watch will not wind properly. It feels jammed. However, when I remove the back and release the mechanism so that the winder can be fully pushed in, it winds OK. Evidently the crown is jamming against the case, preventing the winder from being pushed fully home. The obvious solution is to unscrew the crown on the stem a tad but it doesn't want to move and I don't want to break the stem. Can anyone tell me if there is a neater solution than filing the seat of the crown away?