Way to remove relaxers?

I'm about 1/8 Kenyan (hehe:) ) and so I have curly hair, but it straightens easily. I got relaxer put in my hair last winter, and I had to wait about 2-3 months before I was able to wear it curly again. Silly me used a strong relaxer so I had to wear it straight all the time. Basically you've chemically altered the structure of your hair and so there really isn't a way to un-do it.
Mild relaxers are generally supposed to just loosen the curl and tone down frizziness. They are also supposed to also help cut down on styling time. You can't get rid of the chemicals, but if you just keep conditioning your hair and taking care of it should be ok. What exactly do you hate about it?
What relaxer did you use? I'm thinking of putting extensions in my hair but I want to use straight hair so I need something to help me straighten it quicker. But I want something mild so that I will also be able to go back to the curls when I take my extensions out. Thanks! I hope I helped!