Real world life expectancy of a high end cartridge?

Benjie, You see the cat eyes when you look straight down on the stylus. The eyes will be adjacent to the very tip, one on each side, not 1/2 way down unless you have a stylus that is smaller than anyone knows how to make. The Windfeld is a great cartridge. You would have to spend a lot more to get anything that sounds appreciably better. In terms of tracking you can not find a better tracking cartridge at any price. Send it back to Ortofon and have them re-manufacture it. 

When I was in high school I worked for DBx in Waltham. I constructed the chassis for 32 channel noise reduction units. We had a large bath that cleaned the flux off of circuit boards. We filled it every morning with a Freon. I lived with that smell for a year. Most Chlorofluorocarbons smell pretty much alike. I did not say brake cleaner was Freon. It is another Chlorofluorocarbon that smells pretty much like a Freon. Last is a Freon and nothing else. Its your money. 
Neither Iso propyl or Ethyl alcohols will attack the adhesive used to fix styli in place. You can use Ethyl (denatured) alcohol to clean up uncured epoxy but once the epoxy has cured the alcohols won't touch it. 

Pleased to find out that when my Dynavector DV 20X2L cantilever finally died after 3000 hours and alcohol induced fumbling that Dynavector dealer gave me a good discount on a replacement trade in. Not sure if this is WW?