One should squeeze toothpaste on a dry toothbrush, rather than a wet one so that the cleaning ingredients of the toothpaste can be fully used, said Japanese dentists.

• 日本牙医学界最近提出，刷牙前要把牙膏挤在干燥牙刷上。牙刷不蘸水，挤上牙膏慢慢刷，渐渐出些细微的泡沫，牙膏的清洁成分才能被发挥到最大。