Racked my first brew from my primary to secondary fermenter today. While I originally brewed 2 weeks ago I didn't have Star San, just One-Step. After finding out that One-Step isn't a sanitizer I got some Star San. I used it to sanitized everything used in the racking and secondary fermenter, including the stopper and airlock. Once the beer was transferred I went to to put the stopper and airlock on the glass carboy. Due to the slickness of the Star San that was still on the carboy and stopper, the stopper would not stay put! It kept popping out. Eventually I pushed it down in there are used some tape over the top to insure that it wouldn't keep popping out. I realize that eventually the slickness will go away and the stopper should stay in without the tape but in the future, what should I do to avoid this problem? If this was primary instead of secondary fermentation I would be much more worried.