HOW TO KEEP YOUR WHITE SHIRT WHITE

Zero shades – “Never wash whites with colours,” says West End theatre wardrobe mistress Paula McIntosh.

Dirty secret – Don’t wash all whites together. “Separate heavily soiled items like sports socks,” says McIntosh.

White stripes – “Wash striped items separately,” advises McIntosh. “A Colour Catcher sheet will prevent dye leaks.”

Cold press – “Iron shirts damp,” says Liana Bobina, head housekeeper at the Marriott Hotel, Grosvenor Square.

Basket case – Don’t second-day shirts. “Your skin’s oils can discolour collars and underarm areas,” says Bobina.

Dark pits – Kill yellow stains on shirts with bleach. “Soak overnight then wash on a hot cycle,” says McIntosh.

Laundry fairy – Spot-treat any grease stains with washing-up liquid and a toothbrush, says McIntosh.

Light touch – “Rubbing stains can ingrain them more,” says Bobina. “Always dab them.” Not on your teeth, though.