I don't serge or zigzag. I handwash all fabric and hang it dripping wet. When it is just damp I iron it. If I can't iron immediately and the fabric dries out I spray with water roll up and iron in about 1/2hr. I've cut corners off for years now. Even if it didn't stop fraying it tells me which fabrics have been washed. No cut corners - it hasn't been washed.