That is one spoiled kitty!! You cover her poo???
And yes the poop does stick to the rake and every now then the little trap door would stick a little and when it would finally give it was like a poop and litter explosion!! TWANG! and poopy litter flew everywhere.
Now we use crystals. They absorb the urine odour and really neutralize it. As for the poo...our cat doesn't like to cover either but she is nice enough to poop on a schedule. She is very social and seems to like to poo when we are in the bathroom (usually when DH is in the shower..ha ha on him because then HE has to scoop...I trained her that way

) so we often scoop immediately. The crystals do kinda absorb the moisture and dries up the poo helping with the smell....maybe too much info there.