Dunlop Ultraglide 65 String cleaner & conditioner = useless?

I usually play Elixir strings because I sweat a lot, but every now and then I experiment with regular nickel roundwound strings, and they usually last only 2-3 gigs in my hands.

A friend of mine recommended me the Dunlop Ultraglide 65 String cleaner & conditioner. He told me that it brings the fresh string sound back, instantly, after only one application. So I thought it is worth trying it. Bought one bottle for a few bucks.

To me surprise, it does not work AT ALL. I tried it on one bass with older Elixirs, and the sound did not change at all. I thought that it might not work on coated strings, so I tried it on another bass that had D'Addario NYXLs (3-4 gigs old, no rehearsals), and again, absolutely no change. Actually the only change I noticed is that the strings were very slippery and I had a lot of grease from the bottle on my hands and on the fretboard. But absolutely no improvement, after one and after several applications.

Did you experience the same?

I totally regret the purchase so far. Or did I do something wrong?

 

Does noone have experience with the Dunlop Ultraglide 65 String cleaner & conditioner?

 

Do not need the lube, I hoped it brings strings back to life a bit...