By Zahna Eklund Defrosting your car on the outside is enough of a pain as it is, but things can get more complicated if the inside of your windscreen is frozen too. Britain woke up this morning to icy conditions and freezing temperatures, as the Met Office issued a series of yellow weather warnings that will last every day this week until Thursday. The frosty morning air likely means you will have had to scrape your car windscreen to clear it of any ice before heading out to work, and for some people, the cold weather will have even frozen the glass on the inside of their cars too. But what ca…