Which laundry detergent is better for tough stains, Gain or Ecover Zero?

Gain beats Ecover Zero on tough stains by a wide margin. Gain attacks stains aggressively and lifted grass stains that survived two cycles with other detergents. Ecover Zero is gentler and works fine on everyday dirt, but you’ll need a second round for tough stuff like chocolate pudding. If your family generates the kind of laundry that needs explaining, go with Gain.