Diane Lane
Veteran
The longer the water stays in the microwave, the hotter it gets, as we all know. Heating it to the boiling point spells disaster!
At 212 degrees, there is sort of a violent chemical reaction between the instant coffee or tea and the boiling water - which causes it to "boil over" and create a big mess! And your hands could get seriously scalded in the process!!
To be safe, I start off with cold water in the mug. I set the power on High, but the water is in the microwave for only about 2 minutes and 10 seconds. This helps keep the water from getting way too hot & staying just below the boiling point at about 180 or 190 degrees. There is very little if any violent chemical reaction between the coffee or tea and the hot water, keeping things safe.
I just don't like how it tastes. Also, my friends seem to think heating a cup of water for a minute is enough to make hot chocolate/coffee/tea, and that doesn't work for me, yuck . Note, these are also people who don't cook.