how do you get blue detergent stains out of white clothes?

Answer 1

To remove undiluted detergent or fabric softener stains, try rubbing them with a bar of soap, and washing again, or soaking them in undiluted white vinegar until the spots disappear, at least 15 minutes but no more than 30. (Vinegar is excellent at dissolving soap residue). Launder as usual, and don´t worry, any vinegar smell will wash right out. If this doesn´t work, you could try wetting the stains, and rubbing them with a liquid dish detergent designed to remove grease. To prevent this from happening in the future, try adding the detergent as the machine is filling, and do not add the clothes until after the machine is filled and starts to agitate:)

Answer 2

Try rubbing a bar of bath soap into the stain until the stain is gone, then machine wash using your laundry detergent. If the bar soap doesn't work, pour some laundry detergent on the stain, rub it in, then let it set for a little while. Machine wash.

Answer 3

Bleach.