Overview

• Dr. Xand van Tulleken told BBC Morning Live he washes most clothes at 20°C and reserves higher temperatures for workout gear
• Consumer group Which? found that washing at 30°C removes everyday stains and cuts running costs by nearly 40% compared with 40°C
• The doctor cautioned that 90°C cycles damage fabrics and recommended 60°C only for infection control, such as norovirus
• Experts advise using detergents formulated for low-temperature washes and regularly cleaning the detergent tray and drum to prevent mould
• Online reactions range from praise for energy savings at cooler settings to insistence that 40°C washes better eliminate bacteria and tough stains