Sulfate free clarifier recipes?

My mom got me the tresemme curls condish for me which contains cones and it was on clearance so it can't be returned or exchanged and she said I have to use all of it before getting another condish but I'm a cg. I'm allowing myself to use this one condish just so I can buy another one that is cone free, but in the meantime I do not want to use a sulfate shampoo just to remove buildup so is there anything I can mix with my lowpoo (sheamoisture curl&shine) to clarify my scalp or a recipe I can use in place of a shampoo?
Ace is the name! Only 12 but already hair(&product) obsessed.
3a curls | filipino | very dark brunette
every 2-3 days - SM C&S lowpoo
co-wash - DC OC; SM RSB; TresNaturals Moist.; Vo5 S&C
styling - B&B CCC; CURLS GoddessC; DC ArcAG
drying - (I always scrunch with towel) air dry; microfiber or 100% cotton towel; bowl diffuser (sometimes pixiecurl)
DT once a month - SM DTM
CG since Nov.2010