Hey Violette, thanks for your question. Good news: This hasn't been done for over 10 years (it's banned). In the past, microplastic particles were sometimes used to remove the plaque more effectively. Best regards, Chloe
Hey Violette, thanks for your question. Good news: This hasn't been done for over 10 years (it's banned). In the past, microplastic particles were sometimes used to remove the plaque more effectively. Best regards, Chloe