every month
my dentist told me that
If there is mold on your toothbrush, it's time to buy a new toothbrush.
throw it out or get a new one.
buy a new one
ToothBrush!
As of September 2008: Nick got a new toothbrush and this color is BLUE source:nickjonline.com
Toothbrushes should be replaced as soon as the bristles show signs of wear, splay, fray or when the color indicator changes color. Generally, this is every 8 to 12 weeks. A worn toothbrush would not be able to clean as efficiently as a normal one. http://www.intelligentdental.com/2010/02/22/are-you-brushing-your-teeth-away/
A toothbrush should be replaced every 3 months. It should be replaced sooner if you get an infection or cold within the time you used it.
it might be to the toothbrush but it might not so when the cold sores go brush your teeth with the same toothbrush if they come back its because of the toothbrush.
i would
A toothbrush
I wouldn't put your toothbrush in the dishwasher or boil it. Both reach temperatures that can do damage to the bristles. Listerine is a good option. Sonicare has released a new toothbrush that comes with an ultraviolet light sanitizer compartment on it. So stick the toothbrush head in push the button and 10 min later completely sanitized. Maybe you should consider that instead.
Yes ,the bristles and the handles of toothbrush are made of the same material that is nylon.