In a large mixing bowl, combine dry ingredients: Citric Acid, Baking Soda, and Himalayan Salt. Use a wire whisk to mix the ingredients evenly, breaking up any clumps of powder.
Slowly drizzle grapeseed oil and essential oil blend over the dry ingredients, mixing everything until it is evenly combined. Test a bit of the mixture in the palm of your hand - It should stick together like wet sand. If it crumbles or appears dry, fill the spray bottle with water or rubbing alcohol and add 10-20 pumps of the spritz to your mixture each time. Stir continually.
** Tip: Using the right amount of water is the key to making beautiful bath bombs. You want to use the least amount of water, adding only a bit at a time, so that your mixture sticks together but does not become active. **
Once the mixture is well-blended, you will be ready to add your mixture to your molds. Each mold should be filled to the point at which the tops of molds are “mounded over.” Place one mold in each hand and push the two mounds together firmly. Brush away excess parts of your mixture from the edge of your molds.
At this point your mixture should firmly stick together. If your two mounds are not adhering, check whether the edges of your molds are clean and free of mixture. You can try adding more mixture to the molds, and then repeating Step 3.
Gently tap the top of the molds and carefully remove your finished bath bombs from the mixture. Place bath bombs on a clean surface (a paper towel is good option) and allow them to dry overnight. Repeat this process for the remainder of the bath bombs. Let the bath bombs harden and dry for 12-24 hours, until they are no longer moist to the touch. When the bath bombs are ready to package, cut the tissue paper provided into smaller pieces, wrap them with the tissue paper and seal with the “handmade” stickers.