I use Sensodyne Pronamel.
My gnashers used to be sensitive to heat and cold. I'm happy to endorse Sensodyne - "as recommended by dentists" - and say my teeth are no longer sensitive. I just hate those ruddy TV adverts. You know the ones: actors with unnaturally white teeth, usually ssspeaking with exsssscessive sssssibilantssss to emphassissse their sssshiny non-ssssenssssitive tsseeth.

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Snaptophobic BloggageHeather Kay: modelling details that matter. "Let my windows be open to receive new ideas but let me also be strong enough not to be blown away by them." - Mahatma Gandhi.