With homes in the UK acting like brick ovens and soaring energy bills leaving many in the US hesitant to blast the AC, the summer heatwaves are set to ruin your sleep. You need a way to cool down before bed so you don't spend the next few months sweaty, sticky and sleep deprived.Your internal body clock relies several signals to fall asleep and one of them is temperature — your core needs to drop around 2°F / 1°C for you to drift off. But when your room is too warm, your body is unable to disperse heat efficiently. This leads to tossing and turning, which in turn causes cortisol levels to spike, leaving you vulnerable to 3 a.m. wake ups.But a refreshing bedtime drink such as our Iced Summer Sleep Tea can help your body cool naturally, so you fall asleep fast even in a heatwave. Created by Claire Davies, Sleep Editor and Certified Sleep Science Coach, here we'll explain why this tea works, plus everything you need to make it.How a bedtime iced tea helps you fall asleep fast in a heatwaveOur bedtime tea takes a three step approach to creating the perfect conditions to sleep in a heatwave.First, it's cooling (both literally and mentally.) Served over ice, this tea cools the throat to provide immediate relief from the hot weather.The menthol in the peppermint also makes you think you're cooler (without the shock of ice water.) By triggering the TRPM8 sensors in your mouth, menthol tells your nervous system that you're physically cold.