Note: Clean after use, Sanitize before use. After the bottles have been cleaned with a brush, soak them in sanitizing solution or use the dishwasher with the heat cycle on to sanitize them. If you use bleach solution to sanitize, allow the bottles to drain upside down on a rack, or rinse them with boiled water. Do not rinse them out with tap water unless it has been boiled first. Rinsing with unboiled tap water is a number one cause of spoiled batches.