<<Disclaimer: Verify this information before applying it to your situation.>> Wow- what an amazing response! I guess my problem is not as bizarre as I thought. Thank you all so very much. Several people said they have had a similar problem but didn't know what it was, so I thought I would summarize. The overwhelming majority of responses suggested that I may have Thrush- or candida. This is a an overgrowth of yeast. I knew that this often occurred in the intestines and as feminine yeast infections, but apparently occurs in the mouth too! I don't have much of a history of antibiotic use, which can cause it, but I do eat a TON of sugar. Suggestions were go to the doctor. Also cutback on sugar/fruits etc. , try acidophilus etc. Three people said they had similar reactions to Tarter Control toothpaste. Interestingly enough, I switched toothpaste a few nights ago and have had no white gooey film! maybe it's not a yeast problem after all? I do see my doctor in a week- we'll see. Would a yeast infection just go away like that? other individual ideas: poor digestion, plaque, nutritional deficit, allergy to corn or other food. Thanks so much for the supportive responses and taking the time! Becca Cambridge, MA