As I mentioned in a previous post, I will soon be getting a touch up...I have the Revlon Realistic regular lye system...from posts I've been going through and reading this is a very very strong relaxer, so this has me scared...I've been being nice to my hair and it has increased elasticity and all that good stuff, but I'm afraid that the Revlon is going to eat my hair up...I did a strand test, and at 12 minutes the curl was significantly gone but the hair had lost almost all elasticity..for those who have used this product that have 4a/4b fine to medium hair, how long to do leave the relaxer on including application and smoothing...or is smoothing even necessary forreal with this????