I don't think you strip wash all the time. At least I've never heard of it. I think you only need to do that if you use too much normal detergent and your nappies start to become waterproof.

I think Rockin' Green is the best laundry powder for nappies. It's great stuff. Google should bring it up and there are SAHM who sell it in Aus if you are out here.

No idea bout the carb soda and vinegar sorry!