Well used the drill stir to push off the co2 today,I had some foam come out of the top ofthe carboy....good or bad? I slowed the drill speed and was able to keep most in the carboy. With the drill attachment,I did it for longer than the2 min, and noticed the foam decrease alot, but still had little bubbles on top after...is this normal?The foam disappeared nothing like it was at first.. Note to self Slower drill speed?