K.M.
Ever since my 6 yr old was a baby I have used 1 laundry scoop of Borax in addition to Tide w/bleach in every load I wash. He used to have very soft stool everytime and it would leak through his diapers and get on his clothes. The smell always lingered until I started using the Borax. I've never had a smell problem with my laundry since (including my husbands smelly PT clothes!). Now I've never used the vinegar, but I do know you add it to the rinse water, but I don't know how much.