If you can't use the commercial softners, vinegar in the final rince makes the fabric softer. I believe it deactivates or eliminates any soap residue left in the fabric. I have tried it and it does make a differance.

Ditter

I always use a softener that is dye and perfume free. My DD has too many chemical alergies.

I don't use softener in my fabric wash. I have read not to if you are going to use the iron on fusible as it may keep it from fusing. I know I have read that, but cannot remember where I read it. LOL My poor mind some days is just poof!