Price is not only money for the purchase. Aferwards, it increases the effort of cleaning teeth, on the left using one, and on the right using the other, over th

Price is not only money for the purchase. Aferwards, it increases the effort of cleaning teeth, on the left using one, and on the right using the other, over the next 5 years, before making a final choice based on results at the dentist. At which point both of them will have been upgraded with different ingredients.