Ariel with Downy...
Does a great job for me! As it is sold in a plastic bag, I have a Rubbermaid cereal container to dispense it. Here in Florida, any of the boxed powders I have used will absorb the humidity, and immediately clump, making it difficult to scoop. And I love the strong scent of Ariel, towels in particular smell great, none of that wet dog aroma emanating from liquids.
George