Debashis, I have taken my master switch apart and cleaned it. It was not easy, but not bad. I had to to this very early on in car's life when it was still under warranty. I just had this feeling that it come apart and I can do it. Even under warranty I did not like having those guys do stuff to the car as there was a good chance it would come back with different problems. So, I took it apart, cleaned it and haven't had an issue since. Going on 6 years or so now. Let me say that those things are not meant to be taken apart, but they do come apart and back together if careful. Electric contact cleaner and some air was all it took for mine. I did gauge the platic a bit, but I've gotten used to the gauged look and now consider it "charming", especially that I don't have issues any more with that switch.
Good luck.
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Vladimir. '98 S70 base, 5-speed manual - his, '93 945 (approaching 200K miles and rolling on...) - hers
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