Please choose the correct ending to complete the given sentence: Health: [header] How to use a fluoride rinse [title] Look for a fluoride rinse. [step] There is a difference between a fluoride rinse and a mouthwash. Some mouthwashes do contain fluoride, but you should purchase a fluoride rinse over a general mouthwash if you want the fluoride benefits.

Ending1: [substeps] The goal is to clean the surface of your teeth before a fluoride rinse. Most mouthwashes contain fluoride and other ingredients that will clog your mouth, making it difficult to rinse thoroughly. Ending2: [substeps] Ask your dentist if there is a fluoride rinse that they recommend. They may also have fluoride rinse samples at their office. Ending3: If your mouth still feels painful when you introduce fluoride rinse, you might consider changing your personal mouthwash routine. [substeps] Look for anything with fluoride in it. Ending4: [substeps] Fluoride rinses are commonly used to treat throat pain, but even a saltwater rinse will not work for you if your throat is sore. Always read the product information when buying a fluoride rinse.

Answer format: ending1/ending2/ending3/ending4