My 185 s1 some strings are snapping Under bale and seem to be getting more, they look like they have been cut part way through. I've been trying to find something sharp but without success. Any ideas whats likely to be cutting it? Typically is outside string doing it, and kinda think it's possibly done it on both sides. Was maybe 1or2 in a hundred but today might of been 5+ per hundred. And sods law it was hay wouldn't a been so bad if was wrapping them