Most of the time it is just a bit of hydrogen peroxide plus Natrium (sodium) Carbonate (NOT Natrium Hydroxide) or soda crystals. You can get it much much cheaper just by itself. Many people here use just the Natrium carbonate and then finish with vinegar
(Vinegar instead of fabric softener is also often used because it actually cleans and softens the clothes instead of just covering them with a waxy layer and shoving full of fragrance to give the illusion of softness, clothes doesn’t smell like vinegar at all either)
Most of the time it is just a bit of hydrogen peroxide plus Natrium (sodium) Carbonate (NOT Natrium Hydroxide) or soda crystals. You can get it much much cheaper just by itself. Many people here use just the Natrium carbonate and then finish with vinegar
(Vinegar instead of fabric softener is also often used because it actually cleans and softens the clothes instead of just covering them with a waxy layer and shoving full of fragrance to give the illusion of softness, clothes doesn’t smell like vinegar at all either)