Fishin Farmgirl;
I too have been CHINOOKPROOF. We fished Elliot Bay three days with zippo. Also Trolled for three days south of vancouver island out of Sooke - zippo.
The black box thing could certainly help. May be worth the $.
Chants are good. Also try dipping your net in the water. We sometimes throw coins, like a dime for a 10#, a quarter for 25#, etc.
It may take a sacrifice to the fishing gods. Perhaps losing a downrigger over the side, or running over your favorite fishing pole to break whatever horrible curse may have befallen you.
The most important thing is to keep trying!
Good Luck!
Jeff

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I Wish I were standing in a River,
In the Rain,
Catching Steelhead.