For over 70 years, leading Fortune 500 companies have saved money and time by contracting with Kleen Test Products to discree ... tly manufacture and package their high-profile, consumer products. These well-known companies trust Kleen Test Products to maintain their solid reputation and satisfy their high expectations for superior quality and value. Headquartered in Port Washington, Wisconsin, Kleen Test Products has seven manufacturing and distribution facilities located in Wisconsin and Ohio. read more