Roomba to replace my 690?
the 690 is very dumb and has a small chamber which fills up on the cat litter immediately so looking for a newer model that i can buy used or refurbished that can handle wood floors and cat litter and not eat up power cords, get stuck and do all that dumb stuff. i have a small apartment and my main concern is getting the litter box area cleaned so i don't have to walk on litter all day. what's the best model or models for this. It doesn't have to have the mop (i'm not clear if those are considered worth it or not). but this model is dumb and basically figures out where it is by bumping into everything and never cleans where i need it to clean. like, right now it's as far away from the litter box as possible and is cleaning an already clean area.