Is Ma annoyed? You bet your bippy. Can I afford root canals and crowns for the bunch of you because you don't care about your teeth? Do you think girls will want to kiss boys whose mouths taste like a skunk crawled in their mouth, sprayed, and died?
From now on, anybody who fails to brush their teeth in the evening goes to bed at 8 PM. Anybody who fails to brush in the morning loses their video game time for that day.
Bet you'll all brush now.