Real world life expectancy of a high end cartridge?

Re bending it back -- surprisingly given it's a megabucks cart it's a simple Aluminum cantilever so could be bent back -- but not sure how that would affect my trade value! And "audiophile nervosa" and all that 😖

I would say that sounds about right.
My first bottle is maybe just over half empty and likely bought a pair of bottles about 6 years ago or so.
And I am not as diligent about applying it every side as I should be.

Freon?
Great laugh.
Oh sorry that would be nitrous oxide....

Benjie, Freon is now a very loose term. There are many types that have different vapor pressures. Chlorofluorocarbons are also used as solvents not just refrigerants. They have a unique smell, the smell of Last products and cleaning agents like brake cleaner. They are excellent solvents, evaporate very quickly and are electrically neutral. So, you can spill the stuff in your amp and nothing will happen unlike water or alcohol. There only major problem is that they deplete the ozone layer. Chlorofluorocarbons will not chemically change anything. They are inert. There is nothing in Last products that does not evaporate. Anyone can prove this to themselves with a microscope slide. Don't believe me! 
Last products are great but extraordinarily expensive cleaning agents but nothing else. Keeping your stylus and records clean is important and it will allow them to last longer. I have never worn out a stylus and I watch them under my office microscope. All the cartridges that have failed on me have done so electrically.  

Oh Uberwaltz there is absolutely nothing funny about Freon. In making comments like that you just demonstrate your ignorance on the topic. 
Freon is a large molecule. All you have to do is keep the top on and very little will escape. If you want to have fun just leave the top off over night and see what happens:) Let us know about the results. 
Millercarbon, you ever use brake cleaner? It costs maybe $2.50 a can.