The Dental Wellness Trust is also warning people to avoid storing the household's toothbrushes together and to immediately replace brushes of those who have been unwell to prevent cross infection.
Last week, the charity promised to deliver toothbrushes to London's elderly and homeless people who may struggle with access to one during the lockdown.
The team began mailing toothbrush and toothpaste packs to care homes and homeless shelters.
A spokesperson said: 'When the toothbrush is routinely rinsed with cold water, this does not necessarily kill the virus which remains on the brush until the next time it is used. The only way for the virus to be killed is by sterilising it after each use.
'Soaking your toothbrush in 0.1% hydrogen peroxide for roughly 3-5 minutes is also an option. Then rinse out thoroughly with hot water. What’s more, wipe down the sink/surfaces of any splash after spitting out.'
For those wearing dentures, the advice is to scrub the dentures all over including all aspects of the fitting surfaces with a nail brush and a soft soap. Dish washing liquid is useful as it removes food stains. Then can soak the dentures in water adding a teaspoon of vinegar (acetic acid or white vinegar) into the water.
In limiting the spread of coronavirus, it’s imperative that people regularly wash their hands with soap and water, use a tissue to cover their mouth when coughing or sneezing and avoid close contact with those diagnosed with the virus.
For any London care homes and homeless shelters in need of toothbrush/paste packs, please contact Charity@dentalwellnesstrust.org