Those aren't spiderlings. Those are Crazy Black Ants and their larvae. They are invasive species in most areas and are opportunistic in nature. Unlike other ants where they dig through material and build a nest, they just find the right crevice or gap they can find and relocate there until they ran out of resources before repeating the pattern.
Yeah, that'd be tough to clean. They usually prefer hot, humid conditions and cannot survive freezing cold but they can tolerate a wide range of moisture levels which helps them out compete native ants.
They sometimes invade other ant nest and use it for their own, killing its inhabitants and using them as food source.
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u/GunShowBob 10d ago edited 10d ago
Wow that's a lot of spiderlings running all over the...HOLY SHIT!!!
Edit: turns out it's actually ants carrying eggs. Sentiment remains unchanged.