If there is one item in your kitchen that you ought to throw away it is the microwave.
Over decades, we have been sold a bill of goods about microwave ovens - the idea that they are fast and convenient.
But, the truth is, microwave ovens suck all the flavour and most of the nutrition out of everything. Stuff comes out pretty much devoid of health and tasting of nothing.
If you want to warm up leftovers, buy a small toaster oven. You can re-heat slowly without running up your electricity bill.
But ditch the microwave; it kills your food.