There are many variations of this to be found on Pinterest and online, here is a super-easy, effective one. It smells lovely and makes enough for over 600 loads of laundry. The addition of Oxyclean (or its generic equivalent thereof), helps add brightness and removes stains. Changing out the Fels Naptha for lavender soap adds the calming, clean smell of lavender, my favorite. My source? A sweet mother of seven sitting next to me in our kids' kung-fu class!
4 lbs. Baking Soda
4lbs. Washing Soda
4lbs. Borax (20 Mule Team)
3 bars of Fels Naptha soap, grated
(I used one bar of this, 2 bars of a natural lavender soap)
Container: one big plastic tote works great for mixing
Smaller containers for storage
Pour in and mix all ingredients. Use 1Tbsp. per load.
The first 3 ingredients come in boxes with close to this exact amount, some are 3.7lbs, some 4.1. I happened to have leftover pouches or bigger boxes of some ingredients; I just used the Borax box to measure out quantities. It is approximately equal amounts of each ingredient.