By far the easiest way I've found to clean bottles is by putting them in my dishwasher. 2 hours before I want to bottle I put 50 bottles face down in my dishwasher with NO DETERGENT (nothing). Then it just runs with hot water for 60-75 minutes. I don't open the door until I'm ready to bottle. In the 15 or so brews I've done this way, zero have been infected. It cuts all that washing time down to the amount of time it takes to load and unload the dishwasher. Plus I bottle right next to my dishwasher so I just take them out 1 at a time while I bottle.