HELP! My SNG ability has suddenly disappeared!

[DMMx69]

Ive been playing 6h Turbo SNGs on bodog and fulltilt for the past few months. Started off doing quite well, but seem to have fallen into a major slump, and cant figure out why. Here are the stats:

Bodog:
October: 36+3s: 246 games, ROI=14.1%, 1st%=20.3, 2nd%=21.1
FullTilt:
October: 22+2s: 1st 280 games, ROI=17%, 1st%=20, 2nd%=22
Novembr: 22+2s: 2nd 280 games, ROI=-3%, 1st%=16, 2nd%=22

sample size isnt huge, but the trends are so obvious, there were no big valleys or peaks really, aside from the huge one I am demonstrating.

This is the most frustrated I've ever been and dont know what to do. Ive spent a lot of time thinking about this, rereading the books I've read before. Not sure what to do?