Dumb question #643: should speaker cables last a lifetime?


This assumes I take proper care, normal non extreme environment, etc. and the cables are high quality (shielding, etc). Will cables corrode internally on their own over time or should they last a lifetime?
aberyclark
" Like your car needs a regular oil change - speakers cables pick up all kinds of crap and gunk as well as carbon build up from the power amplifier - best to change cables every six months."....

....Said the salesperson. ;^)
Current salesperson knowledge is no better than it was 40 years ago.
Helomech did we have magnet,liquid cables before 40 yrs ago ?Or are we waiting for air cables...salesman are better 40 yrs ago...now they just tell you Google it..