Teeth need constant care, which is why they need to be cleaned so often. Dentists recommend brushing your teeth in the morning, evening, and after each meal. Thus, the tooth enamel will be stronger and the teeth will be whiter. If you don't brush your teeth in the morning, they will become weaker and the enamel will be destroyed. As a teenager, I brushed my teeth only in the morning. By the time I was 20, they were very sensitive and yellow. I started going to teeth whitening services in Lake County ON and brushing my teeth more often. After a year, my teeth were strong and white.