Reviewers report the following about shopping for laundry detergent for standard or high-efficiency washing machines. Note that there is a separate ConsumerSearch report on stain removers and pre-treatments.

  • Powder vs. liquid detergent? There seem to be more liquid detergents out there at the moment than powered laundry soaps, and more liquid varieties are included in testing. Some say that powdered detergents work best in hard, hot water and for removing mud and clay. Liquid detergents are better for removing grease, oily dirt and stains. Liquid detergents can also be used as a spot treatment for stains. Overall, we didn't find conclusive evidence for choosing one over the other.
  • Products without perfumes or dyes may be helpful to people with sensitive skin or allergies.
  • Consider buying detergent in bulk and transferring it to smaller containers at home, saving on plastic waste.

Experts recommend the following about using laundry detergent:

  • Do not use regular detergent in an HE machine. Suds may remain on clothing or in the machine, subsequently causing mildew.
  • Add both powder and liquid detergents to water in the washing machine before clothes are put in. Powdered detergent in particular can leave residue on clothing if it hasn't first been dissolved into water.
  • Cold water is fine for lightly soiled clothing. Hot water should be used for diapers, underwear and clothing worn by people who are ill.
  • You can pre-treat a stain before washing by applying a liquid detergent or a paste made from powder detergent onto the fabric on the opposite side of the stain.
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