There has been a litter problem on the pitch for years.
Surely it’s not beyond the club to have ground staff, ball boys, stewards, volunteers or in fact anybody, tasked with regularly taking a bin bag around and picking up the stuff around the pitch . Collect the stuff on the pitch during breaks in play. Take a bag up the walkways and ask for rubbish like a flight attendant .
Just at least show that an effort is being made to have some pride in the place.
There’s always plastic bags , easy caught by the wind , brought into the stadium by supporters and chucked , lazy , they should also show some pride.