Stan...where are you lol.
I only know a little about using *soap* in a washer, encluding ZOTE flakes. I think soap requires very soft water, hot or at least very warm water, and multiple very warm rinses, otherwise the soap will not wash out of the fibers of textiles and over time will cause the clothing to become dingy. IMO this is one reason why the homemade version of laundry soap on the net doesn't work. I also think soap can be used with great results if the proper protocol is used. This is really STANS area of expertise, and I'm sure he will be around.
Maylingsmom, thanks for the zote read..I know a few people that use zote on stains, personally I prefer FELS NAPTHA, a little rubbed on a stain is a great stain formula.