Haha, of course I do š ... Well just use volcanic soil, or in German: "Lavaerde" . I've been using this for over a decade. For rinsing, use a splash of unpasteurized apple cider vinegar diluted with water. 1:10 (it's like a conditioner, but without silicones or petroleum derivatives)
It won't foam... but it doesn't have to. And I suggest not to wash hair more often then once a week or even better once a month...