EFERO Teeth Whitening Essence 10g.Brand efero Product Description Pure plant extract, safe to use. Safe, easy to use plaque remover Easy to use without damaging the enamel. EFERO Teeth Whitening Essence is effective on dental plaque, smoke stains, tea stains, coffee stains, tooth stains. How to use Teeth Whitening Essence First clean your teeth, then remove the pen lid and rotate the tip of the whitening pen until the essence come onto the brush head then apply the product evenly on