I love my grease pencils and use them for writing kitchen leftover contents on glass and ceramic dishes. This works like a dream when the dish is warm and just fine when the dish is room temperature.

However, it's nearly impossible to write on cold or frozen dishes. In my old lab when was young and stupid, I'd hold the spot I wanted to write on over a flame for a few seconds (lucky I never exploded a liter of expensive research water and glass on myself, or worse). Now I do my best with vigorously rubbing the spot with a kitchen towel for a few seconds, but still usually get a barely readable mark.

Aside from figuring out how to etch those little white squares that lab glassware has onto my kitchen dishes, anyone have any ideas around this?