Hand sanitizer is a common inclusion in a restroom service package because it directly relates to maintaining hygiene standards in facilities. Businesses often seek to provide a clean and safe environment for employees and customers, especially in restrooms where sanitation is a top priority. Hand sanitizer not only helps in reducing the spread of germs but also enhances the overall cleanliness experience for users.
On the other hand, the other products listed, such as window cleaning supplies, furniture polish, and dish soap, are more suited for other types of cleaning service packages, typically involving general or specialized cleaning rather than restroom maintenance. Window cleaning supplies are aimed at cleaning glass surfaces, furniture polish is used for maintaining the appearance of furniture, and dish soap is intended for washing dishes, none of which address the specific needs and services within restroom facilities. Thus, hand sanitizer is the most appropriate choice for a restroom service package.