Funny, I usually try to practice my bass immediately after eating some greasy chicken when I have new strings on it.
As for Fast Fret... It's interesting stuff. Immediately after using it, I definitely notice a little added brightness, but I also find that it can accelerate the break in process on brand new strings.
What it is, is that new strings and sweaty fingertips make for a rubbery feel,... too much friction. Fast fret lubes out that friction and makes for a comfy set of strings.
....or something.
