It can be a gross thought, thinking about what lies beneath and around you as you snuggle into bed ready for a relaxing sleep.
As the average person spends around a third of their lives in bed, either sleeping or trying to get to sleep, it can be disconcerting to think that in there with you are probably over a million dust mites with you, living off your shed skin.
And then there's the bacteria pollen, possible fungi and pet hair and fur to consider - you might not have a good night sleep again. But don't despair because there are things you can do to make your bed an oasis of calm and is aimed predominantly around your mattress.