Annoying Problem on popping out of drive mode on S2?

Recently I posted on how to remove the Samsung Voice Talk in my Samsung S2. However the problem persist but this time the car mode is being activated by its own. It is really annoying as it constantly opens up your phone seemingly somebody is calling me or texting me if I am in silent mode. I am already out of options as I browse for answers and ask those who are in customer care of the said cell phone until  i somebody suggested me to clean the usb port with a brush. Oh yes! It solve the problem.