Do you do have third party companies do "challenge" tests to ensure that your products, which have no preservatives or only weak preservatives, do not grow mold, bacteria, or yeast?
Testing of our products is handled in-house. As with any products that have water, there is always a chance for bacteria growth. We use a combination of ingredients to help preserve the product, but there is no 100% guarantee that there may not be mold growth. We recommend always closing the container after each use, as well as to use clean hands when handling the product, to prevent any bacteria from reaching the product.