Soft and fluffy towels: The secret is not the fabric softener!

You must use:

1 liter of demineralized water
10 drops of essential oil
1 cup of citric acid
All you have to do is pour the water into a bowl and add the ingredients listed in the list. Then mix well to dissolve the citric acid and then soak the towels in the mixture for 60 minutes. At the end, you just have to rinse it and let it dry.

Alternative remedy number 2
If you want everything to be even simpler and faster, you can simply use baking soda. All you have to do is pour a measure of baking soda into the fabric softener compartment of your washing machine. Thus, at the end of the wash cycle, the towels are soft and no longer gray, but the white towels become even whiter and brighter.