A study of half a million Britons found that those who ‘frequently’ hoover, do the ironing and take out the rubbish are a fifth less likely to develop dementia compared to those who do it the least.A study of half a million Britons found that those who ‘frequently’ hoover, do the ironing and take out the rubbish are a fifth less likely to develop dementia compared to those who do it the least.Read MoreHealth News | Mail Online