You might be missing the spirit of RC's, Iriba.

RC's, or state tests, aren't supposed to be literal proofs that you are dreaming or not. Instead, they are meant to be vehicles for you to ask yourself if you're dreaming, and then do some simple function to prove or disprove your state. Every time you do a state test, your question, "Is this a dream?" should be the same, and, more importantly, your curiosity about whether it's a dream should be the same.

In almost all RC's done in waking life, it's completely obvious that you're awake, and if you think about it as actual proof that you're awake then yes, you will likely not have a successful RC after that first one in the morning -- you will even feel a little dumb doing them! But, if you consider an RC as a way to train your mind to have a look around, regardless of where you know you are, and you use a test that will work for you in a dream, then the RC might work better in the dream. Remember, in the dream you have that same attitude -- that you are obviously awake -- so it doesn't matter whether you think the RC will work or not; if you're dreaming, it will work.

Bottom line, don't take the RC's too literally. Instead, use them to train your mind to be prepared to both test your state during a dream, and to be interested in testing your state during a dream.

I hope that made sense.