Despite the plummeting temperatures, you should never sleep with your heating on. Winter is in full swing, with Storm Bert delivering high winds and heavy rain across many parts of the country, just days after some regions woke up to a blanket of snow. The chilly weather makes staying under the covers all day incredibly tempting, as we all strive to remain as warm and snug as possible. This week has seen many of us succumb to the cold and switch on our home heating systems. However, if you're