I have 3b curls and I want to loosen my curls what can I use?

I have 3b curls but I want to loosen them to 3a because my curls are tight that's why my hair has a lot of frizz and is hard to control. It always looks big and puffy. What product can you suggest?
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Answers
2B/2C, fine hair, low density, mixed porosity, protein loving hair
Current products:
Gretchen
NaturallyCurly.com co-founder
3A
You are beautiful!