A baptism rinse is usually something people use to help them leave a lot of their conditioner in the hair. Instead of rinsing it out, you stick your head briefly under the shower to completely soak and help distribute the product. It's something the cg handbook recommends for wavies if I remember correctly.
2c/3a, dense, fairly coarse, normal porosity and elasticity, bsl curly, WL wet
Low poo: Giovanni 50 50
Co-wash: down under naturals, tresume naturals
LI: Giovanni Direct, Desert Essence curl cream
Stylers: kccc, HE smu, brhg
Oils: coconut, argan or evoo