I just went to take a sip of water, and noticed there were some floaties. At first I thought they were dust, so I went to catch them with my finger. Not dust... or at least, not harmless, bit of fluff from the air dust... it is gunk from my whiteboard! (I've been helping lots of students today!)
Note to self: don't put mug on desk next to whiteboard.
Off to clean mug...
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