Never Wash These Items at 40°C: Here’s Why It Matters
Many people automatically choose a 40°C (104°F) wash cycle because it seems like the perfect balance between cleaning power and fabric care. While this temperature works well for many everyday clothes, it’s not the best choice for everything. In fact, washing certain items at 40°C can shorten their lifespan, damage delicate fibers, or fail to remove bacteria when a hotter wash is needed.
Knowing which temperature to use can help keep your clothes looking newer for longer while also ensuring they are cleaned properly.
Delicate Fabrics
Silk, lace, satin, cashmere, and fine wool are sensitive to heat. Washing these materials at 40°C may cause them to shrink, lose their softness, or become misshapen. For these fabrics, use a cold or gentle cycle and always check the care label before washing.
Bright and Dark Colors
Higher temperatures can cause colorful fabrics to fade more quickly. Washing dark jeans, black shirts, and brightly colored clothing in cool water helps preserve their original color and reduces the risk of dye transferring to other garments.
Athletic Wear
Sports clothing is designed with special moisture-wicking fibers that can be damaged by excessive heat. A cooler wash helps maintain the fabric’s stretch and performance while removing sweat and odors when used with a quality detergent.
Items That Need Higher Temperatures
Some laundry actually requires temperatures above 40°C. Towels, bed linens, kitchen cloths, and clothing worn during illness may benefit from hotter washes, depending on the fabric care instructions, to help remove bacteria and allergens more effectively.
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