Hi!
i want to ask why don’t i go lucid even if i remember doing RC’s in my dreams?
in 4/5 dreams i did an RC!!! 
It’s not unusual that RC’s fail, that’s why some times it helps to have more than one on hand to test. Always remember to do multiple RC’s, even if a RC succeeds I always do another.
For example, last night, I woke up in the middle of the night and decided to WILD when I layed back down. Didn’t take me long however as soon as my dream started I was in my bed, sort of a like a FA but not really cause I knew I WILD’ed. Every thing looks the same but I knew I was dreaming, I looked at my hands and they looked normal (which is even weird for me, rarely does that fail) so I was in my room doing random things testing if I was dreaming or not, eventually I had to get out of bed and run around the house and look at the clocks in the living room and mess with the lights before I actually got any results.
Though it really does suck when you don’t really know if you’re dreaming or if you know you’re dreaming and can’t get any RC’s to work, it really messes with you 
any way, summary of the story, always use multiple RC’s!
Regards,
Zak
Sometimes when I do a RC in a ND, it fails to make me lucid because I don’t question what I see enough.
For instance one time I looked at my hands in a ND, but I didn’t really question what I saw, so that blew it 
Isn’t the text reading RC fairly foolproof? Is here anybody who manages to read more than few words in a dream?
-NL
And think during RC ! If you are doing RC, ask yourself " Am I dreaming?" . If you see more / less fingers it should be logical, that this is a dream. It’s exacly what zup said : He did not questioned reality. He just looked at hands, so he ignored it. He did not asked himself “Am I dreaming?”.
Indeed, in your dream you perceive what you see as reality and you don’t think it’s weird that you have for instance four fingers. When RC’ing, you should always make sure that you think by yourself ‘is this how it should be’. Raising your awareness is vital.