What are some cheap home remedies for frizzy hair?

I have very naturally frizzy hair and can't afford alot of expensive de-frizz products. Does anyone know of any "home remedies" for getting rid of frizzy hair. And I have tried:

curling irons

blow dryers

straighteners

flat irons

all sorts of de-frizz products

I am looking for some good home remedies. Nothing expensive. For example: if I pay $15 for a bottle of Extra Virgin Olive Oil - I'm not putting it in my hair.

Thank you.

eggs...sounds stupid, but it makes it softer and calms it. I haven't tried this myself, but just so you know!

u should try biotin shampoo and conditioner