- Take one cup of baking soda and put it in a bowl. Break up any clumps so that it’s fine and smooth. Add ¼ cup of citric acid to the baking soda and mix well.
2. In a separate glass, add ½ teaspoon of vinegar and 1 tablespoon of hydrogen peroxide. This is the part of the fizzie (or toilet bomb) that’s going to act as a cleaning and disinfecting agent, so it’s definitely necessary.
3. Next, add this mixture drop by drop to the baking soda and citric acid mixture. Do this slowly, because if not, the chemicals will react together and make a big mess. Once they’re all together, continue to mix well.