Its hard to tell, if it's in the break room it definitely could be mold from condensation, could also be just grease/food byproducts from microwaving or cooking, dust/dirt, etc.
Worked in a kitchen with these tiles and cleaning them was a pain in the ass
How can mold grow on the metal vents, i think its just dirty from the vent spewing out air all the time
Its hard to tell, if it's in the break room it definitely could be mold from condensation, could also be just grease/food byproducts from microwaving or cooking, dust/dirt, etc.
Worked in a kitchen with these tiles and cleaning them was a pain in the ass