We do a lot of laundry at our house. I used to go through fabric softener like it was going out of style. It gets really expensive so I found this recipe to make my own. This costs about $.02 per load (not counting the added water cost). From one batch, I am able to get 32 loads. The only fabric I have ever had a problem with while using this softener is my flannel pajamas. But to be honest, I don't mind a little static on my jammies.
How to make your own Fabric Softener:
Add 1 C conditioner (I use coupons to buy conditioner. I can get a bottle (2 C) for $.50)
Homemade Fabric Softener
3 C water
1 1/2 C vinegar
1 C hair conditioner (I use Suave)
Measure water into a bowl. Add conditioner. Whisk together. Add vinegar. Whisk again. Pour into a container or bottle of your choice. To use, add to your washer in according to the washers instructions.