White vinegar might be the best replacement for fabric softener
Why White Vinegar Should Be in Your Laundry Room
Everyday Tips : Use White Vinegar as a Fabric Softener - Clean Mama
How to Use Vinegar as a Cheap Alternative to Fabric Softener
DIY Infused Vinegar Fabric Softener | Hello Nest
Homemade Fabric Softener With Vinegar {It Works!}
This or that: Vinegar vs. Fabric Softener - Figgy & Co.
Organic Fabric Softener – Rustic Strength
Is Fabric Softener Necessary? Not in These 5 Situations | Apartment Therapy
What are the benefits of adding vinegar to laundry soap and/or fabric softener? How does it compare in effectiveness to using them without vinegar? - Quora
When Should You Avoid Using Vinegar In Laundry? - Downy FAQ | Downy