How to make a do-it-yourself liquid detergent: up to 12 litres with only a few ingredients

Pour the water into the sauserole and start heating.
Add the pieces of cut soap and mix well. Allow to simmer for approximately 2 hours until the soap is completely dissolved.
Add the vinegar and sodium bicarbonate.
Turn off the heat and allow to cool for 30 minutes.
Pour the liquid detergent into plastic bottles and make sure they are only filled to 1/3.
Pour water into the bottles, with 1 part of dishwasher and 2 parts of water (e.g. 100 ml of dishwashing liquid, 200 ml of water).
Leave to act about 12 hours before use.
Caution: Do not add essential oils to perfume the detergent.
Now that you know how to prepare liquid detergent from very simple ingredients that are accessible to everyone, try to prepare it right away, you can save tens of euros.