How to whiten towels without bleach?

To do this, proceed as follows:

1. 1. Pour half a glass  of white vinegar  into a bowl of hot water
   2. Soak the towels in it for a few hours or overnight.

1. Wash
2. Wash as usual

Vinegar is not only a  perfect bleaching agent  , but also a very effective  ecological deodorant  .

citric acid

For your information: Citric acid is an active component of lemon. How to use it to whiten towels:

1. 1.  Dissolve 150 g of citric acid in one liter of lukewarm water
   2. Add 100 ml of the solution to the detergent compartment

1. Always add the same amount of solution each time you machine wash