Unlike your scalp hair, your beard doesn't need daily cleansing. Frequent washing can strip away natural oils, leaving your beard dry and irritated. Here's a general guideline:
2-3 times per week: This is a good starting point for most beard types. Adjust based on your activity level and climate.
More active beards: If you sweat a lot during exercise or work in a dusty environment, consider an extra wash.
Dry climates: Dry climates can further dry out your beard, so you might need to shampoo even less frequently (1-2 times per week).
Listen to your beard! If it feels dry or itchy, it's time to cut back on washing.