I have been a Verdun digger since 22 years, in the early days none was cleaned.
everywhere shells, helmets and weapons.
I will give you a short impression whats still left on the fields there, everything on the pics is found on sight.
2 german handgrenades, and some 75mm french scrapnel shells.
German trench Mortars:
on the outsides 2x 77mm german scrapnel and on the inside 2x 75mm french
German egg grenade, not fused, removal cap still in place.
105mm HE shell
and cleaned at home a VB riflegrenade: