Homebrew PCBs

> I etched my first succeful board last weekend using the Epson paper,
> no green film, and the sponge technique. It took a little longer than
> I expected for the board to etch, but I think that was because the
> FeCl was somewhat colder than it ideally could have been.

Does FeCl get old? I have some FeCl that I bought a long time ago (8
years) but never opened yet.

Adi