[rotorwrench]

Mylar film is more stable than the old wax paper was for an insulator. The foil used and the way they connect the electrical lead seams to affect the problematic construction that manufacturers use now. On some, if you pull on the lead at all then it will come right out of the can. With all the technology out there, they should be able to build a decent condenser that lasts a long time but they just plain don't give a damn.