A month ago, after using a needle from a new pack for several weeks, my machine started skipping stitches. I changed needles and it worked fine for about a month. Then, today it started skipping stitches again so I changed needles. Well, it started skipping stitches again after only a few minutes. I rethreaded the top thread and exchanged bobbins as well to see if that helped. Nope, still skipping a stitch every 2o to 30 stitches maybe. If I sew really slow, it didn't skip stitches during the past maybe 3 feet of sewing but I don't think that is a "fix".
What should I be checking or changing? All of these needles come from a new pack I purchased in August --Schmetz Microtex Sharp 70/10. I'm using them for a combination of batik and 100% cotton piecing. Maybe the pack is defective? I don't have any other Sharp needles I can try and that is what I've been told to use on batiks.