If the top of the radiator is cool, or much colder than the bottom of the radiator, it's a sign your radiators need bleeding. This could be the reason your home is taking ages to warm up despite having the heating on full blast. Here is how to do it. 🚨 Want more content like this? Then sign up to our free Weekly Scoop email for all our latest news, tips, reviews and advice ➡️ https://whi.ch/weeklyscoop | Which?