Anyone have experience with "burn-in generators"?

I've had a Hagerman "Frykleaner Gold" for years and wouldn't be without it. Neither, it seems, would my audiobuddy friends, who have borrowed it a lot :-)

An addendum to Ivan nosnibor's post, with which I agree. It's particularly
important to cook phono cables, the ones used from a cart/tonearm to a
phonostag,e because the signal they carry is so minuscule that the cables
never get really broken-in otherwise. Friends and I have also used my
FryKleaner to cook the tonearm wires themselves. Takes a little ingenuity
but is well worth the trouble and, yes, the results are audible in terms of
clarity and openness.

EDIT: Do not have the cartridge attached to the tonearm wires if
attempting this. The idea is to cook ONLY the tonearm wires, which
requires making a wire harness to connect to the clips at the cartridge end.
And do not exceed the number of hours (72 maximum in the case of the
FryKleaner; for others, use the cooker manufacturer's recommendation) for
the tonearm wire "burn." You're dealing with fragile wires here and don't
blame me for any accidents/overcooking/etc :-)

Very ingenious, Bob. I did sorta the same thing, but plugged the RCAs attached to the cart clips into my Frycleaner. I burned in the phono interconnects separately, but I see how you could do them at the same time.