In this tutorial, we learn how to make laundry soap. First, grate soap up into a large bowl. After this, pour the soap into a large pot. Add in 6 c water, then heat this up on medium heat for 40 minutes, not letting the soap boil. Next, add in washing soda and borax into the pot and mix together until well combined and dissolved. By now, the heat should be off so the mixture doesn't come to a boil. Now, dump your mixture into a large bucket and then add in 1.5 gallons of water. Over time, this will gel and then within a day it will get thick. You may want to add more water when you add it to your machine, then you will be able to do laundry for only pennies a load!