Predicting and Evaluating Connector Performance in a Capacitive Sensing Application
The mating cycles seldom affected the touch performance in our studies where we were working with the TI captivate sensors. 
Rhe mating cycles wil definitely I created the contact resistance of the foil or the whole sensor connection collectively
The variation in the resistance will not significantly impact the quality of the capacitive sensing application in terms of sensitivity
Go for a gold plated connector (FPC or even plug receptacle type) for almost no variation in the sensitivity
According to my data, change in temperature and humidity will have significantly higher effects than the small change in the contact resistance
I would suggest to note down the variation when the same experiment is repeated multiple times. Later, you can manually increase the series resistance by a few 10s lot Ohms and see the variation.