Don't pitch the SAME yeast. Pitch a different strain. Now that it's down to 1.034, throw some Nottingham in there and it'll likely perform better than more champagne yeast. It's very possible that more champagne yeast will perform the same as the champagne yeast that's already in there, i.e., not at all.
Primary #1 - Midnight Ryeder (Midnight Wheat and Rye)
Primary #2 - Florida Weiss
Primary #3 - Kane-DOH APA (Honey Citra APA)
Secondary #1 - Downtown Flanders Brown (brewed August 2012)
Keg #1 - Raspberry Florida Weiss
Keg #2 - Cinnamon Raisin Cider
Keg #3 - NONE!
Bottled - NONE!