DIY: Natural Mold-Killing Laundry Detergent – Mold Blogger
Pulse the soap on high until what remains are large crumbs. Add the washing soda to the food processor and pulse for 1 minute. (After pulsing, all the ingredients should be in powder form and well-combined. If not, try running the food processor again and then mixing with a spoon.) Empty the washing soda and castile soap into the storage container.