* Metal parts: Many pens contain metal parts like the tip, clip, or internal mechanisms. These can spark and cause a fire in the microwave.
* Plastic parts: While some plastics are microwave-safe, others can melt, deform, or release harmful chemicals when heated.
* Ink: Ink can potentially ignite or release toxic fumes when heated.
In short, putting a pen in a microwave is a safety hazard. It's best to avoid it completely.
