My 14 year old daughter has terrible BO. I just found a bunch of t-shirts that have been sitting in a pile for a long time. Most of them are black. I washed them with regular Tide detergent and they still stink terribly. Does anyone have any laundering advice? Will the vinegar take the black color out of these clothes? I need help. I have never had a BO problem, so I am at a loss. Thank you.
The vinegar will NOT take the black out. My gram has used vinegar on my gramp's black pants for years and she says the vinegar actually keeps them black longer. As far as the smell, switch the vinegar to lemon juice. If you can't line dry, try not using dryer sheets because sometimes the scented sheets can smell sour. If you do use dryer sheets, make sure they are the same scent as the detergent.
Ditto on the baking soda. I use about a half a cup along with my regular detergent and it really does the trick. A bit of detergent and baking soda in a presoak also helps.
Ammonia does take the color out of some materials. I used it on my kelly green bathroom towels, and now they are an olive color. DO NOT use ammonia on your black things. Baking soda should do the trick. Ammonia will take the smell out very well, but it does cause color fading, and don't believe anyone who says it does not. It is not as bad as bleach, but it will. Baking soda is much milder.
I have heard that vinegar in the rinse also works, but I have never tried it. Just don't use vinegar with ammonia or baking soda, as they neutralize each other, and all you will have is salt water.
Does your daughter have problem perspiration as well as BO? My sons did. One uses Mitchum as it works better than all the other brands, and another had to use a product called Drysol. Ask your pharmasist for advice.
I normally only use cold water to wash my clothes, but I have found hot water is sometimes needed to remove odors caused by the bacteria you are describing. Teens have extra oily skin and its more of a problem for them than for adults, imho. I'm sorry I didn't know about hot water to remove odors and grease when my kids were that age. It would have helped with their bedding. Good luck.
White vinegar often works well to remove perspiration odor from clothing. This is a page about solutions for removing armpit odor on clothing.
This is kinda embarrassing, but my husband's shirts, in the armpits, are very stinky even after I wash them (he's not, just the armpits of the shirts). This is a page about shirts with stinky underarms after washing.