i use Crest Pro-Health Enamel Shield Toothpaste i have something wieds happen?

sometimes i have used toothpaste and swished it kinda like mouthwash well when i have used the pro health products after about ten fifteen minutes i notice a a gooey white film i guess u would say along my lips and my inside of my cheeks it peels off kinda feels cool but i was wondering if anyone knows why
 
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