DIY Laundry Detergent

I’ve been using a diy laundry detergent for several years. I’ve had to buy additional fels naphtha but I’m just finishing the washing soda. I still have borax. But I always fix the next batch when I start the last gallon. So I looked up the dry recipe and made a little bag using one cup of washing soda, one cup of borax, and half cup of grated fels naphtha. I put it in a ziplock and wrote 2 tablespoons mixture and 1/4 cup water.