Cleansers are products that are intended to clean the skin by removing dirt, oil, makeup, and dead skin cells. They contain special ingredients that help to unclog pores and to prevent skin conditions such as acne. They may also contain moisturizers to prevent the skin from drying out. Cleansers leave the skin feeling clean and fresh. The safety of Cleansers is established by selection of ingredients that are safe and suitable for this purpose. In addition, Cleansers are assessed for their potential to cause skin irritation or cause allergic reactions. Product safety is also established though strict adherence to the principles of Quality Assurance and Good Manufacturing Practices. This includes testing the compatibility of the product with packaging as well as shelf-life stability. Finally, the safety of products is monitored in the market-place to track any reports of consumer injury. Companies include a phone number on their products where comments or complaints may be reported. A related topic of interest includes Triclocarban.