I never pay for this. "No cavities again! Would you like a flouride rinse?" "Why would I do that? I have flouride in my mouth rinse and my tooth paste." "We

I never pay for this. "No cavities again! Would you like a flouride rinse?" "Why would I do that? I have flouride in my mouth rinse and my tooth paste." "Well, ours is a higher concentration that I paint onto your teeth." "Didn't you say I had no cavities?" "Well, yeah." ".... so what I'm doing seems to be working without your rinse" "Well, it's only $16" "My flouride rinse has the exact same active ingredient as yours and costs $5 for an entire bottle." And it just goes on and on.