The frequency at which one should change a razor blade can depend on several factors, including personal shaving habits, hair type, and skin sensitivity. Generally, Dollar Shave Club suggests that individuals change their blades approximately every five to seven shaves. However, if you notice any tugging, discomfort, or a less effective shave before reaching that number, it may be an indication that it is time to replace the blade sooner. Additionally, it is advisable to keep an eye on the blade's condition, as dull blades can lead to irritation and nicks during shaving. Taking good care of the blades, such as rinsing them thoroughly after use and storing them in a dry environment, can also prolong their lifespan. For specific recommendations tailored to your lifestyle, you may want to explore resources on the Dollar Shave Club website.