I always liked to fill the sink with a solution of OxyClean. I let them soak for a couple of hours, longer if I had to get labels off. Rinse the very well with fresh water. On bottling day, I filled a bucket up with StartSan and gave them all a dunk and a quick soak. If you allow them to sit with the StarSan on them while you are prepping and bottling, you will have nice, clean, sanitized bottles.