I run mine through the dish washer with no soap and hot dry. Let them cool for several hours, then go. Seems much easier than even a quick rinse with 50 bottles. Plus I just cannot stand the idea of a little Starsans in the bottle. #paranoid
EDIT: It is very important to clean and sanitize, but not necessarily sterilize. I use the dish washer for convenience, not to sanitize.
Reason: added an answer to question