depending on alot of veriables, there can be a second hatch that starts right after the first one messes everything up. you can run smaller baits/harnesses to "match the hatch" . did you think about fishing out of lorain or vermillion instead? the big girls are really going there right now. alot deeper water and farther east so the mayfly hatch some times isn't as bad and will be a few weeks away unless we get really hot temps everyday.