system
Given the following post, respond as if you're commenting on Reddit:
human
[Red dwarf] wouldn't there be loads of stuff left over from the cat civilisation everywhere?
gpt
The cat civilisation evolved in the sealed cargo holds, so everything was contained in that area and it was rare for Lister to take a trip down there. 

Kryten probably sees it all the time as he goes foraging through the holds, looking for any supplies that the cats didn't eat, but Lister has little interest in a civilisation whose greatest accomplishment was a combined hair curler/dryer. 

The Cat couldn't care less about the old stuff, as soon as he got out of the hold, he began the long process of claiming everything else on board Red Dwarf and making sure everyone knew it was his. It would be rare for anything from that civilisation to make it up to the sleeping quarters where Lister and Rimmer lived most of the time.