Yes, it's very normal, you see, if you don't change it every week, some chemical reaction will make your toothbrush unhealthy to brush with, and that's what make teeth yellow
But there is some toothpaste that prevent this, but it's very expensive, and you can only buy it in africa.
My advice is, change your toothbrush every day, the change of destroying your teeth is just too big.
Is it normal that I use a new toothbrush every week?
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Yes, it's very normal, you see, if you don't change it every week, some chemical reaction will make your toothbrush unhealthy to brush with, and that's what make teeth yellow
But there is some toothpaste that prevent this, but it's very expensive, and you can only buy it in africa.
My advice is, change your toothbrush every day, the change of destroying your teeth is just too big.