Care Instructions: To care and keep your porcelain diffuser white and brand new, we recommend using Oxi Clean. Gently soak the porcelain diffuser in warm water with 2 scoops of Oxi Clean. Let it soak overnight and very lightly use a clean toothbrush to scrub away the dirt. These materials can be purchased anywhere near your local stores. This may vary in scent and odor. Avoid using all abrasive and aggressive chemicals, scrubs or pads that may damage the finish and design of the product.