I've got this white coating on my tongue, that never goes away. I brush my teeth and use mouth wash two times a day, taking an average of 5-10 minutes. I do not smoke, or drink alcohol. My teeth seem completely healthy, and I sit there scraping my tongue to get this guck off for 15 minutes at a time yet it never goes away? What do I do? What could this be? And do you know any causes or cures?
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