What are the small spider? insect? pest!! that creats 'webs' along the baseboard of my (finished) basement?

They leave little blackish specs on the floor That are difficult to wash off.

Answers:
Thier called "microbial carpet spiders" they love baseboards let me tell you what!!! Like a rocketship thier little web squirters pump out a perfect baseboard corner web.. AMAZING quite simply.

Other answers:
The answer by Main Brain above me is correct. However, these spiders are more commonly called "Dirt Spiders." It might even be an overgrown "Dust-mite" which usually cannot be seen by the naked eye. These are more common household terms than microbial carpet spiders, however the gentleman, or gentle lady is correct. They are probably the same type of spider that often lives in the perferations of old dirty carboard boxes. If you've worked around a lot of carboard you'd know what I mean.
The answer by Main Brain above me is correct. However, these spiders are more commonly called "Dirt Spiders." It might even be an overgrown "Dust-mite" which usually cannot be seen by the naked eye. These are more common household terms than microbial carpet spiders, however the gentleman, or gentle lady is correct. They are probably the same type of spider that often lives in the perferations of old dirty carboard boxes. If you've worked around a lot of carboard you'd know what I mean.
there is a tree fruit you can use to get ride of spiders they are called monkey balls it does work i put them in my basement evey year spiders hate them
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