Fabric conditioner is a staple in most laundry routines, poured into a separate compartment of the washing machine tray before a cycle starts. Beyond leaving clothes soft and pleasant smelling, regular use reduces static cling, makes fabric easier to iron, cuts down on pilling and helps prevent colors from fading.
There is no real difference between what people call "conditioner" and what others call "rinse aid" or "softener": it is the same product, sometimes with slightly different names abroad. In England it is typically labeled "fabric conditioner," while in the United States it is usually sold as "fabric softener," though the contents and function are the same.
When not to use it
Using conditioner on the wrong fabrics can damage them. It should be avoided on terry towels, since it makes the pile stiffer and less absorbent.
Sportswear should also be skipped, because the chemicals in conditioner clog the fabric's micropores, making garments less effective at wicking away sweat. Membrane jackets are another exception, as conditioner forms a film that can break down the membrane's structure and let in water and wind.
Swimwear and other items made from elastane or spandex can lose their elasticity, shape and water resistance if washed with conditioner. Microfiber items such as cloths also lose their ability to absorb moisture when treated with it.
Dosage guidance
Everything else, including bedding, underwear, everyday clothing and socks, can safely be washed with conditioner. For a 1 to 3 kilogram load, one to two tablespoons is enough. A 4 to 5 kilogram load needs 2 to 3 tablespoons, and loads of 6 kilograms or more can take 3 to 4 tablespoons.
