My method which allows skipping of unnecessary scrubbing of about 95% of bottles. I'm not going to describe label removal as that is a thing for another day. Pay close attention and don't skip step #1:
1) When consuming a bottled beverage and you wish to reuse the bottle, RINSE WELL IN HOT WATER IMMEDIATELY 3 OR 4 TIMES, then add to your stash for as many days, months, or years as you want.
2) On bottling day, rinse each bottle 3 times again, then fill each bottle to the brim with hot water and set aside.
3) While filling bottles, if you notice an unusual amount of foam on top, set aside for stronger scrubbing later.
4) After every bottle is filled with hot water and you know which few are problematic by observing foam on top, scrub those bottles with a brush, rinse, then fill with hot water to the brim for the second time, repeating steps 2 thru 4 as necessary.
5) When no more bottles are problematic, fill a tub with several gallons water and StarSan, then set each filled bottle in the tub.
6) Wait a few minutes.
7) Drain all bottles and set into empty cases ready for filling.
Ta-da. Every bottle is sanitized and you only had to scrub like 5% of them.
I've been doing this for >15 years on many thousands of bottles and never had a problem with inconsistent carbonation or random contamination, etc.