The type of fabric and how frequently the shirt is worn determine how frequently the shirt dry cleaning is required. To maintain their clean look, dress shirts used in formal or business settings should be dry cleaned every three to four years. However, more regular dry cleaning may be required if the shirt is subjected to odors, stains, or excessive perspiration.

To maintain their quality, delicate textiles like silk or linen might need to be dry-cleaned after every use. Whenever possible, look for detailed directions on the care label. By protecting the fabric from harsh washing techniques, routine dry cleaning not only keeps your shirts looking new but also increases their lifespan.

Original Source: https://www.quora.com/How-frequently-should-a-shirt-be-dry-cleaned/answer/Hello-Laundry