As temperatures drop and heating costs soar, many Brits are likely reaching for electric blankets to keep cosy throughout the night. But did you know that using them with certain mattresses could not only reduce your mattress's lifespan but potentially spark a fire? Mattress specialists at MattressNextDay are cautioning that combining them with memory foam mattresses could prove a "costly and dangerous mistake". Memory foam is specifically designed to react to body heat, softening slightly to