I'll put in my 2 cents, and it's only specific to myself and my limited experience so take that for what it is. I was originally just using shampoo on my beard once a week, and then I got lazy and a few days ago I realized that I hadn't washed my beard in maybe a month (I was rinsing and using conditioner regularly though) I wasn't liking the way my beard was looking the last week, it was sort of not symmetrically shaped I think because of oil build up and it was laying flat in some areas and more fluffed out in others, so I decided to shampoo it the other day and it fixed that issue right away. I dunno if there is anything to that, but I'm going to go back to washing my beard once a week at the most, most likely every other week though..