Some additional details: You can use any pure soap like Dr. Bronner’s Pure Castile soap or Fels Naptha. Make sure to avoid soaps that contain ingredients you can’t pronounce. Washing soda, also known as sodium carbonate or soda ash, is non-toxic, but can irritate your skin, so wear rubber gloves when you handle it. Both washing soda and borax are versatile household cleaners that are environmentally friendly. I’ll bet grandma cleaned with both.
If you would prefer to make liquid detergent, which is a little more complicated, visit tipnut.com/10-homemade-laundry-soap-detergent-recipes. If you think I have too much time on my hands, visit consumersearch.com/laundry-detergent/green-laundry-detergents for a list of the most popular truly green detergents, and the estimated price per load of each.