Grumpy_Mike:
I am developing a capacitive sensor with my Arduino UNO,
but I am having a problem with low sensitivity.So you know that the technique you are trying to use is not reliable and repeatable and is not used in any commercial system. It is in the tutorial as a novelty, many people have made the mistake of trying to develop it but unfortunately it is not a good technique to use.
You are free to try however, but this is the sort of problem you run into.
Hi Mike,
yes, I have read multiple posts that made me question the reliability of this technique.
However, I wanted to try this one because it was more suitable for a project I am doing. I am well aware of other easier techniques (for example ir proximity sensors, especially the Sharp GP2Y0A02YK0F model), but I wanted a technique that involved the human body.
Do you have any suggestions to improve my project? What other techniques would you advise? 
P.S.
I have stumbled upon your nickname many times during my research, so it's kind of an honour 