Learn how often you should replace the coffee filter in your coffee maker for fresh and flavorful coffee every time. Paper filters should be replaced with each brew, while reusable filters need regular cleaning and replacement every few months. Find out the impacts of using an old filter and the benefits of using a fresh one. Consider factors like the type of filter, frequency of coffee brewing, and water quality when determining replacement frequency. Look for signs that indicate the need for a new filter, and follow recommended replacement frequencies for different types of coffee makers. Proper maintenance tips are also provided to ensure optimal performance and longevity of your coffee filters.