brush teeth

[2kung]

for how long has a brush been in use that would reduce its plaque removing abilty up to 30 per cent than a new one?

[iwbus]

Not as long as proper grammar that's for sure

[cliffsdoll]

2 million years

[mycatis]

1251588 days

[dove]

depends which hand you are holding the toothbrush in and whether it is electric or not.

[funnywebsite]

99%

[Scarlett]

12 and a half