Firstly, Dr. Wolff advises eating something sour, as evidence suggests foods such as tart cherries, kimchi, or vinegar, can stimulate the salivary glands. wikiHow also advises you to drink some water to moisturize your mouth.
Next, push your tongue out of your mouth and lift it. Then curl the tongue back so it rests behind your top teeth.
Finally, tense your tongue muscles to squeeze the sublingual gland.
Dr. Wolff insists: “Everyone can [gleek].”
Can you gleek on command? Let us know in the comments.