What should I clean my retainer with to ensure its longevity and hygiene? Are there specific solutions or ingredients that are particularly effective for removing plaque and bacteria? Should I stick to traditional methods like mild soap and water, or is there a consensus on the efficacy of commercial cleaning products designed expressly for retainers? Furthermore, is it advisable to utilize natural alternatives, such as vinegar or baking soda, and if so, what is the appropriate dilution or application method? How do the cleaning routines differ between different types of retainers, such as clear plastic versus metal ones? Additionally, have experts weighed in on the potential risks associated with using abrasive materials that could scratch the surface of the retainer, ultimately compromising its integrity? What frequency of cleaning is recommended to maintain optimal oral health, and are there specific signs that indicate it’s time for a thorough cleaning session?