Making Laundry Detergent

So I have heard about making your own laundry soap before but never did it. Recently my Pastor's wife did and said she loves it. So I decided to try it last night went and purchased everything I needed which I found all of the ingredients at Walmart supercenter, first you take a 1/3 of your Fels-Naptha bar and grate it, boil 4 cups of water, once water is boiling add the grated bar and whisk until completely melted, then add 4 more cups if hot water, add 1/2 cup of Borax, and 1/2 cup of Arm and Hammer Super Washing Soda and whisk until melted, be careful cause it can get bubbly quick, once melted take off burner. If you would like it to have a little bit of a smell you can use about 40 drops of your favorite essential oil fragrance or get a small thing of your favorite smell of detergent and substitute a cup full of it for the water, I just use essential oil because I already have it from massages. Now this recipe makes 2 gallons there is a 5 gallon recipe which I can get for you but I don't have an easy to use 5 gallon bucket laying around or the room for it, I used a large ( like Costco liquid) size laundry detergent container I already had or you can use 2 milk jugs. If you use one container put 22 cups of water in it, if you use 2 put 11 cups in each container. Then add your hot laundry mixture 1 container it will be all of it 2 containers will be about 4 cups each container. Shake and let sit for 24 hours, occasionally mix because I guess the solids can sometimes separate from the liquid, I didn't have this problem but just be aware of it. I haven't tried mine yet but will be Thursday ( laundry day) and let you know if I like it for the past 2-3 years I have been stuck on this all natural detergent called Eccos so I am a little weary. This recipe is very cheap to make costing between $1-$1.50 a gallon to make so for the 2 gallons it cost about $2.50 to make that is CHEAP