HOW TO AVOID VAPER’S TONGUE? Drink more water: Dehydration is perhaps the most common cause of vaper’s tongue, so drink more water to ensure your salivary glands are working properly. Reduce your caffeine and alcohol: Alcohol and caffeine are both diuretics which speed up the process of dehydration. Clean your tongue: when you brush your teeth, you shouldn’t forget to clean your tongue too. This reduces the amount of damage.