B..
When I need to strip my diapers, I wash several times on hot. (I do this every few months.) I actually bump the temp on the hot water heater up, so the water can get really hot. Then, I dry them in the sun. If you have hard water, vinegar and baking soda aren't doing you any favors. Oh, if you have hard water, buy some Calgon. It's a water softener you can find near the laundry stuff. I always use that when I strip the diapers.
What kind of detergent did you start with, and what kind are you using now? You could still be using a detergent that isn't right with cloth diapers.
Gamma G:
Poop does NOT go in the washing machine!!! You get the poop out of the diaper FIRST. Vinegar cleans machines as well as bleach, and you do NOT have to wash the machine every time. When is the last time you even used cloth diapers? They are different now, they are not the same as years ago. Your advice is simply wrong.