How to get rid of NPC corpses & change default prop limit

[Proactive]

So on my DarkRP server I have a quest system that involves killing NPC's and whenever I kill them the corpses just stay there forever and I can't clean them up with anything. Is there any way I can get them to like fade away after a certain amount of time or just straight up auto-delete them?
I've tried doing sbox_maxprops 300 in my servers config file but it doesn't change shit, so where tf do I set the server defaults?

[joeyjumper]

i believe there's an option in FAdmin(the default tab menu)

as for the corpses of NPCs put this into the shared autorun
timer.Create("removeRagdolls",60,0,game.RemoveRagdolls)

[Proactive]

I don't use FAdmin and I figured out how to do the corpse thing cheers, any ideas for the props thing tho?

[Stanstar22]

If your quest system supports a feature when the quest is finished and the quest props are spawned in a specific area, try

for k,v in pairs(ents.FindInBox(Vector(x1,y1,z1),Vector(x2,y2,z2))) do
if v:GetModel() == "<the model path you want to remove here>" && !v:IsPlayer() then
v:Remove()
end

end

ents.FindInBox