I wash my yellowed pencil case exactly like my grandmother did, it turns incredible white!

Lemon juice
Finally, you can use a natural bleach par excellence, lemon . This lightener is super effective on fabrics and helps remove stains of different types. It is necessary to pre-treat the elements to be removed with lemon juice: we need at least 5-6 lemons, the juice of which must be placed in a container. It will probably be enough to wet the fabric, which will then be immersed in water and left to soak for half an hour. The acids will act and we can then wash at 40°C in the washing machine. If we have several clothes to launder, we should try diluting the lemon juice with the necessary amount of water.

Try one or more of these methods and let us know!