Why do some places have dust and others not? Our house seems to need redusting days after a full deep clean, while a colleague told me she could leave her holiday home in Sweden for a year and come back to a spotless space. Is it the population density? Legacy of industrialisation? Car pollution?
James de Malplaquet
Post your answers below (and new questions) or send them to nq@theguardian.com. A selection will be published on Friday.
