Cave spiders are much smaller than regular spiders, and can fit through any gap a spider can fit through, however, its height is a half block. This makes them much harder to contain and fight on your own terms. Cave spiders can also track you through solid walls, so they are difficult to ambush.
 Unlike regular spiders, Cave spiders have a poisonous bite. If you are poisoned, your health will deplete until you only have half of a heart left. You can heal poison by drinking milk, but this can take a while. Try to use your milk between battles.
 Cave spiders can hold their breath for 16 seconds, and then die after another 6 seconds. If you can flood or bury the spiders, you should be able to kill them with relative ease.
 Cave spiders are only spawned by monster spawners, so destroying the spawner will prevent more spiders from appearing.
 Monster generators are often surrounded by lots of cobwebs. These will slow you down but do not affect the cave spiders' movement. Use your sword to break the cobwebs.
Beware of gaps.
Heal poison attacks.
Suffocate the spiders.
Destroy the monster spawner.
Beware of cobwebs.
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