The following comes from Matt Hambly of Men's Health:
White might be the most versatile shirt color you can buy but it is also the hardest to keep clean, especially if you’re wearing one every day of the week. To help your white shirts forge a distinguished career rather than a temporary contract we spoke to Philip Start, the man behind tailoring brand Mr Start, for his advice. Known for his contemporary take on tailoring and menswear, Mr Start's shirts are among the best money can buy. Here's how to keep your white shirts clean.
Wear, wash, repeat
“Wash your shirt every time you wear it,” says Start. “We occasionally have people tell us that they wear a shirt two or three times between washes. We wouldn’t recommend that. It gives oil and dirt a chance to build up on the garment and become hard to wash out.”
To boost the efficiency of your wash, add half a cup of white wine vinegar to the machine. The acidic extra is a very effective cleaner and will help break down the blood sweat and tears you’ve poured into the working day.
Drop the soap
Despite (obviously) needing to clean your shirts a lot, what you shouldn’t do is add too much soap. An excess of detergent can actually make your clothes appear dirtier. Detergent coats your clothes during a wash and if you add too much, not all of it may be properly rinsed off, leaving your shirt looking dull. In addition, it can attract more dirt and grime. “Pay attention to measuring out the right amount of detergent- don’t just judge it by eye,” says Start.
Strength in depth
The best way to elongate the life of a white shirt is, of course, to wear it less often.
“If you can, buy more than one of an item you know you’ll be wearing a lot,” says Start. “If you’re planning on regularly wearing a white shirt, the more you own the better, really. Reduce the number of times you wear something and it will obviously last longer.”
Keep in touch
When choosing a shirt, pick it up. See how it feels in your hands. “If it feels like it’s good quality, it probably is,” says Start. "The better the quality of the fabric, the better it will wear and wash.” Heavier cotton and twill fabrics tend to retain their colour for longer as the fabrics are thicker.
It’s undoubtedly a frivolous option but as a last resort, Start suggests having your shirts professionally cleaned. “They come back spotless, ironed and added to that, they’re washed correctly (i.e., all of the above has been done right). I have shirts that have been professionally cleaned that still look new, years later.”