The frequency of changing a Kotex product depends on individual needs and flow levels. For pads, it is generally advisable to change them every four to six hours, or more often if the flow is heavy. This helps ensure optimal protection and comfort. For tampons, the recommendation is to change them every four to eight hours, but they should not be left in for more than eight hours at a time. It is important to find a routine that works best for personal comfort and to avoid the risk of Toxic Shock Syndrome, which can occur with prolonged use. Always pay attention to personal flow changes and make adjustments accordingly. For detailed information on specific Kotex products and their instructions, one might consider visiting the Kotex website, where additional guidance and resources can be found.