https://mods.factorio.com/mod/PollutionSolutions2

There is a slight issue with that mod that makes it so enemies that spawn in orbit spawn their xenomass everywhere, leading to everything being full of it. Is there any chance you could figure out a fix? I'm gonna message the dev of that mod but I don't think they are working on it anymore

Huh. Based on that mod description I can see it makes sense to spawn xenomass when destroying them. It would be cleaner to get it fixed up in Pollution Solutions, but I'll see if there is a way to make the orbital robots disqualified.

Yeah I asked the dev of that mod to fix it but it hasn't been updated in 2 months and is buggy in places (if you remove a pipe by hand the whole thing flushes, removing all the fluid) but one of my friends needs it on our world meaning I can't remove it.
I wish I could, it feels bad.

Right now my sollution is kinda scrappy, with a bunch of inserters removing the xenomass from my main belts and then a blueprint deployer that clears the whole ship off of xenomass

Checking out how Pollution Solution handles the xenomass drops, it looks for the Enemy force. I moved the Fulgora defence robots to a new force that is the same in all but name, so the drops have stopped. Give version 0.2.2 a shot and see if its fixed.