Please choose the correct ending to complete the given sentence: Health: [header] How to avoid getting canker sores [title] Use toothpaste that does not contain sodium lauryl sulfate. [step] Sodium lauryl sulfate (sls) can be found in some commercial toothpastes and mouthwashes. Sls is often used as a cheap filler to help toothpaste thicken and foam up.

Ending1: [title] Use a bulb or food processor to dissolve food residue. [step] Many people use their bulbs or food processor to put hummus in their mouth and drip off in the garbage, where it will be thrown away. Ending2: [substeps] This can cause your mouth to foul because of the metals in the product. Try using a whole combination of sls and sodium lauryl sulfate, as it is one of the more common toothpaste. Ending3: You may want to try 1-2 teaspoons of their dental oil per day to avoid having it smear your mouth. You will need to buy 2 to 3 tablespoons of these ingredients when applying most new toothpastes. Ending4: But this additive has been shown to increase the likelihood of developing canker sores in your mouth. [substeps] Read the labels on toothpastes and mouthwashes to make sure they are free of sls before you use them or search online for brands that specifically do not contain sls.

Answer format: ending1/ending2/ending3/ending4