A couple of years ago I changed my bottle cleaning method. Now, I quick rinse immediately after pouring and let stand full of water. When finished drinking, I pour out the water and fill them with a bleach solution - 3/4 tsp bleach per quart of water, increasing the concentration as the jug of bleach ages. When 6 months old, it is half strength. These sit overnight. In the morning I rinse the outside manually with hot water, and use a jet washer for 15 seconds on each with hot water for the inside. I like that better than any other method I've tried.