Microwave Plate Warmers 2 "Doesn't beat a kettle" Mr gibbons 30 January 2020 1 plate and warmer, 1 minute in the microwave makes the plate and warmer hot. But temp on plate (using a non contact thermometer) varies between 40C-100C. The warmer sits on top of plate giving potential for bacteria transfer. Boiling water heats plate evenly to 50C-54C after 1 minute, no storing of warmer reqd, no cleaning of warmer reqd, microwave still available for heating food. Hot water wins hands down. A note from the team It warms 4 plates at once and keeps them warm for up to 30 minutes. It heats the centre so the plates are easily handled. It's dishwasher safe so easy to clean. However we’re very sorry to hear this and will be in touch shortly.