Can you put a tea bag in the microwave if it has a staple in it? According to electrical engineer William Beatty, it's fine as long as the staple is submerged in water. If metal is left unexposed in a microwave oven, the metal will deflect the microwaves and cause sparks.
Also question is, is it okay to microwave water for tea?
A good cup of tea is a wonderful thing, but if you don't have a hot water tap or a kettle nearby, you may be tempted to toss your mug in the microwave to get some hot water. That may not be a great idea, according to Slate—microwave ovens inevitably lead to less than ideal tea water.
How long does it take to boil water in the microwave?
Stir it a bit, leave the chopstick/skewer in the cup, and heat on high for one minute per cup of water (so 2 minutes for two cups, etc.): "Take 1 cup water. Heat it in the microwave on high power for 1 minute. (In a 1000 Watt microwave it takes 1 minute to boil 1 cup of water)."