answer:Keeping hair straight and smooth without blow drying probably won’t happen. You can use deep conditioner paired with shampoo designed to straighten hair. Towel dry it and then brush it out straight. Use anti-frizz serum and brush continuously while it dries. But that’ll take even longer than just blow drying it. Have you ever considered getting it straightened at a salon? It lasts about 6 months. My hair is thick, wavy, and frizzy as well and it sucks, but blow drying and using a flat ion is the only thing that works, and I’ve tried it all. Even then, humidity ruins all the work I put into it. Next time you get a haircut, tell the stylist to thin your hair out. That’ll make it a bit more manageable.