We've used BIZ since I was a kid
Biz beats every other laundry additive I've every used.  My mom used it decades ago when I was growing up and it still works better than anything else on the market.  I can't figure out why it's so hard to find in stores.  I guess because they don't spend a lot on mass advertising so there is little demand.  Most sellers on Amazon were pretty expensive IMO but by buying a pack of 4 boxes I got the best price.  It'll probably last until my grandkids grow up but at least I have a good stash now!  For really tough stains, make a paste and spread the paste on stain.  let it sit and work for up to hours before washing.  Ive never had an issue with this technique damaging colors.
Rating: 5 stars