Machine wash cotton eyelet pieces in cold water on a gentle cycle using a mild detergent. Turn garments inside out before washing to protect the embroidered edges from friction that can fray the stitching over time. Avoid bleach, which weakens both the cotton base and the embroidery thread. For drying, hang the garment on a padded hanger while slightly damp rather than tumble drying. If ironing is needed, press on the reverse side on a low setting, taking care not to flatten the raised embroidered edges.