Today I made a container of homemade fabric softener, and though I've only done one batch of laundry with it so far, I really like it. My clothes seemed fresh and fluffy.
First I dissolved 1/2 a cup of Gain Fireworks Scent Booster with 1 cup of hot tap water. Stir until dissolved, or mostly dissolved.
In a LARGE bowl, dump 1 cup of baking soda. Very slowly and carefully, one cup at a time, add 6 cups of white vinegar, stirring until dissolved.
Stir your scent booster mixture in and put into a container that will allow for easy pouring.