Instead of buying laundry soap, I make it myself. I can make 2 gallons of liquid soap for around $2.50.
LAUNDRY SOAP RECIPE
1 C. BORAX
1 C. WASHING SODA
2 BARS OF IVORY SOAP OR
1 BAR FELS NAPTHA SOAP
1 - 2 gallon bucket with lid
Other instruments needed:
Instructions: Grate soap using smallest side on your grater and set aside. Add 1 gallon of water to pot, add borax, washing soda and grated soap and let boil, stiring constantly. Let soap melt. When soap is melted, add 1 gallon of hot water to bucket and stir in soap mixture. Stir well, put on lid and set aside until next day. The next day the soap should be a block of hard gel like substance. Take hands and break up the block of gel. This step is actually quite fun and my favorite part. When broken up enough, take your blender stick and blend it up until it is creamy and smooth.
You are now ready to use your homemade soap. It only takes a cup of soap per washer and if you have extra dirty clothes, I usually add 2 cups to those really soiled washes, because it just makes me feel better.
I hope you enjoy saving money with your homemade laundry soap.
Here's a video from Twara Kellum and Jill Cooper of LivingOnADime.com showing you how they do it.