Not that I'm doubting this, but what do they gain by saying 40-degrees on the packet? 2 answers

Asked by nicepaul 8 months ago

1. 
   clagnut

   Kind of obvious, but it's just the temperature the clothing manufacturer reckons you need to get the item clean. Modern detergents are usually effective at cooler temperatures.

   So just try it - if your t-shirts still stink after a 30° wash, I guess you'll have to stick with washing them hotter :-)

2. 
   davidmead

   I'm trying to wash clothes in cold water or on the warm setting where possible.

   Here's a link that outlines the benefits:

   http://www1.eere.energy.gov/consumer/tips/laundry.html