Poohbear,
I use a relaxing balm and/or my ceramic flat iron...does a great job but I limit it as much as possible. once Im past about 10 weeks there is no straightening w/out heat though...as a matter of fact I have found Im one of those people who gets breakage around that time so from now on Im an 8-9 week relaxer. I went 12 weeks this last time and am regretting it seeing all the little fly aways and a little breakage in the middle of the back of my head(most sensitive part of my head for some reason).
If u dont want to use heat, I would use a pomade to smooth out the front while wearing it in a protective style if thats your thing.
Ive been wearing twist outs lately and loving it...a cute non heat style and a little new growth wont bother it at all...lol.