[For those who don't know, the Duo-Sonic has what is known as "classic" tuners. This means that the new strings must be cut to exactly the correct length *before* being run through the holes in the bridge and over the saddles to get to the tuners. Tedious work, sigh.]
Anyhow, I use the best strings around -- Elixir Nanowebs Lights (.10 size) which are nicely slinky on this short-scale guitar -- but while they're long lived, they don't last *forever*. So it goes.
- Badtux the Musician Penguin