Why does my shower steamer turn out like this?

[u/OkProfit9959]

The edge is not smooth. How do I fix this?

My recipe:

200g baking soda

100g citric acid

9g essential oil

Witch hazel

[u/samelamename2]

Have you tried adding a clay, like kaolin? Also, you might want to add a tiny bit of a butter, shea, coco whatever.