Spiders do produce poop after they eat and digest their food just like we humans do.
But the spiders poop is different than human poop.
When you see a spiders poop the spiders poop will look like pin head-size splats or drips in shades of white, gray, brown, or black.
Also unlike humans and other animals spiders do not produce urine and poop from different areas of the body.
Instead the spiders urinate and poop through the same anus of the spider and the urine and poop is combined with each other.
So you won't notice the spider pee separately from the poop.