capacitive touch screen

i am confused about capacities touch screen working that even applying a plastic protector on the screen which is bad conductor how body charge is transferred to the screen .
even i have tried thick plastic bag on my finger still the touch works, how its possible

HI Adbul,

Here are some references that may enlighten you regarding your query:
# "How touch screen work("")":https://www.youtube.com/watch?v=FyCE2h_yjxI
# "Okay, but how do touch screens actually work?("")":http://scienceline.org/2012/01/okay-but-how-do-touch-screens-actually-work/
# "What do you know about touchscreen?("")":http://www.eeweb.com/electronics-quiz/what-do-you-know-about-capacitive-touch-sensors

Try checking them out. I hope this would give you quite the idea.
Kevin

there is a lot of material available on the internet, in short can you answer my question