Make money online: YES

Window cleaning can be a remote-friendly side hustle as you can operate it from various locations without the need for a physical office. However, there may be some in-person requirements depending on the size and type of properties you are servicing. Online discussions on platforms like Reddit and Twitter suggest that while window cleaning can be a lucrative business, it requires dedication and hard work to build a reliable client base. The success of this side hustle may depend on your location, access to potential clients, time zones for scheduling appointments, and the necessary equipment. It's important to note that setup costs for window cleaning can range from $200 to $1,000, including purchasing cleaning supplies and marketing your services. With consistent effort, it's possible to start seeing profits within 2 weeks of launching your window cleaning business.