Are you trying to make laundry detergent or dishwashing detergent? I've been making both for years. Fine for HE washing machines.

For laundry detergent I use -

1 bar Oil of Olay (grated. I use a metal grater)
1 cup borax
1 cup washing soda
1/2 cup oxi-clean

Mix and store in an airtight container. You only need about 2 tablespoons per load. (I think I got this recipe from the Prudent Homemaker blog, but I'm not positive.)

For dishwasher detergent I use -

1 Cup Washing Soda (I like Arm & Hammer)
1 Cup Baking Soda
3 packages unsweetened lemonade drink mix (Make sure you use the unsweetened!)
1 Cup of Salt

Mix and store in a VERY airtight container. It tends to clump together.

Use about a tablespoon in the main cup. I always add vinegar to the bottom of the dishwasher as well. I have no idea where I found this recipe.

I put my borax in with my powedered detergent in the detergent compartment.

After a failed attempt at making homemade dishwasher detergent, I have some Borax and washing soda to use up. They both just say to add them to your laundry to boost washing power. So which compartment do I add it to?
A) pre-wash

B) detergent (with the liquid soap)

C) bleach

D) fabric softener