How do I tame my naturally straight but frizzy hair?

My hair is naturally straight, parted down the middle, and about shoulder length, but my hair is constantly frizzy along where my hair is parted, especially along the front near my forehead. We have very hard water at my house with lots of soapstone, and I'm wondering if the frizziness is due in part to the water. When I wash my hair, I tend to use lots of conditioner in hopes of taming my hair. I've heard you should use cold water when washing out your conditioner, but the water I use is always warm throughout my shower. I let my hair air dry. I even find that when I get my hair washed at the salon that it's still frizzy. I've used about four anti-frizz serums with either no results or greasy looking hair. I don't like putting a lot of time into my hair, so I'd like a relatively quick and easy solution, if possible. Thanks! Any help would be greatly appreciated.

You could try using a hair iron, that usually stops my hair from frizzing (takes about 5-10 mins in the morning), or instead of air drying it, dry it thoroughly with a hair dryer (not too hot)

You can get some frizz control products.

try aussie I love that stuff it helped my hair and its fairly cheap!