To keep your shirts and blouses in great condition, either machine wash them on a gentle cycle or hand wash in lukewarm water, avoiding hot water to prevent shrinkage and fabric damage. Use a mild detergent formulated for delicate fabrics, and turn garments inside out before washing to minimize fading. If machine washing, choose a delicate cycle and a low spin setting, and always wash separately from items with zippers or rough fabrics. Avoid using bleach, as it can damage the fabric and affect color. After washing, air dry your garments flat on a clean towel or drying rack, avoiding direct sunlight to prevent fading. Do not tumble dry, as heat can shrink and wrinkle the fabric. If ironing is necessary, use a low to medium heat setting and iron while the fabric is slightly damp. Finally, store your shirts and blouses in a cool, dry place to maintain their shape and longevity.