Please choose the correct ending to complete the given sentence: Health: [header] How to clean an electric toothbrush [title] Create a mixture of bleach and water. [step] Once a month, give your toothbrush a deep clean using bleach and water. Mix one part bleach with 10 parts water in a small container, like a cup.

Ending1: You can also use a squirt bottle to make the mixture. [substeps] If you're using a squirt bottle to clean an electric toothbrush, make sure you use the right kind. Ending2: Make sure the container is big enough that you can submerge your toothbrush's head completely. [substeps] Wear gloves when handling bleach. Ending3: Put in some water to make the mixture that will clean the toothbrush and applicator. [substeps] Don't use ammonia, acrylic or household bleach, as these can clog the applicator too. Ending4: Scrub the toothbrush in the mixture to remove dirt and germs. [substeps] The bleach will lighten colored teeth immediately.

Answer format: ending1/ending2/ending3/ending4