2240 co2 cartridge will not come out

you need and hot glue gun and a wood dowel and you guessed it, glue the dowel to the to the cartridge 

if you do not have either you could, i have, take the gun outside and hold on very tie and throw the gun straight down but don't let go the cart might, could come out 

the glue and the stick works every time 

old empty cart will get stuck, i have had it happen to me and many other have had the same problem

in really there are not stick that hard but you can't get a hold of them 

stick and hot glue