I found a bunch of these around a kitchen sink in an apartment building in Toronto, Canada, in late October, 2019.
The bugs vary in size, but are all very tiny, less than one millimeter (the photos were taken with a macro lens, and still barely captured them).
They move very fast when they detect light changes, and hide in the crevices around the sink.
They die very easily when squashed.
Edit: Managed to shoot a larger, more photogenic specimen.