I happened to spill some nasty smelling liquids in the trunk, tried to wash it on the spot but still the smell won't wear off. My question is, how can i remove the support cardboard(the one right above the spare wheel spot), because it needs serious washing. Tried to pull it normally but it won't budge, and as i noticed the end of the cardboard goes below the back seat sofa. I wanna do this on my own, but i need some instructions and a bit of patience. Thanks and sorry if i messed up some words.