Valuable info in this article. You can use any essential oil you like except for maybe cinnamon or banana which may damage the inside of your dishwasher. Oh and I think this is NOT for peeps with stainless steel dishwasher interiors.
When your dishwasher isn’t wafting the freshest scent or cleaning your dishes as it should, giving it a good cleaning may fix your problems. Instead of spending hours scrubbing, make these supereasy dishwasher baking-soda bombs that do all the work for you. Along with being eco-friendly, this just-about-free cleaning solution does an amazing job freshening your dishwasher while cleaning all those nooks and crannies that collect bits of food, harbor mold — and all that other icky stuff.
You need: 2 cups baking soda, 3 tablespoons hydrogen peroxide, 10 to 20 drops essential oil, mixing bowl, large spoon or ice cream scoop, parchment paper, sheet trap, 2 cups vinegar, 1 tablespoon dish detergent, ceramic or glass bowl.
Put the essential oil mix you want to use together in a small spray bottle and set aside.
Slowly spray the essential oils on the baking soda while mixing until you’ve used all 90 drops. It should fizz a little bit when the moisture touches the mixture, but if there is excessive fizzing you are spraying too quickly. The mixture should start to clump and look like the picture on the right above when it is ready to be put into molds
Put the mixture into a silicone mold – or you can press it into an ice cube tray.
Let the bombs dry for at least 6 hours, then remove from the molds and store in a container with a tight lid.