What specific substances or products should one consider employing to effectively clean a hot tub, ensuring that it not only appears pristine but also remains hygienic for regular use? Are there particular commercial cleaners that are widely recommended by professionals in the field, or might household items suffice for this purpose? Conversely, could there be detrimental effects associated with the use of certain chemicals that might not only compromise the integrity of the hot tub but could also pose health risks to its users? Furthermore, how do the varying materials, such as acrylic or fiberglass, influence the choice of cleaning agents, and what precautions should one take in order to avoid any potential damage? In addition to these considerations, what are the best practices for maintaining cleanliness over time, including frequency of cleaning and preventative measures to minimize buildup? Are there any innovative tools or techniques that can enhance the cleaning process?