And along with the hair washing thing, of course you need to wash your hair, but do it every other day. Your hair needs its natural moisture. But if you wash it every day it doesn't get the chance to get it moisture. If you was it every day it becomes very dry and brittle.
Also straightening your hair every day fries the heck out of it. Especially with the chi straighteners that heat can go to 410, I recommend not turning it up that high if your a person that straightens your hair a lot. It will make split ends more noticeable and unappealing! Sorry that was long!