Repairing electric razor

Questions,
What can be done to eliminate self-starting; slide switches which have become exremely sensitive to the touch and often times turn on when set down after use.
Slide switch covers no longer return to full "off" position. Ive had to use scotch tape to prevent them powering on when placed in suitcase, for example. Is this problem characteristic of Braun razors?
Can a nonprofessional open up casing to administer a very thorough cleaning? And where would one get an instructional schematic? Can one be obtained from Braun?

Thx!! Vince