I'm usually pretty good at keeping the litter tray clean. Twice a day it gets scooped, then once a week it gets scrubbed and disinfected (with the scooped litter being returned after cleaning). Then about once a month - 6 weeks I let the litter run low so that I can chuck it all out and start over with fresh litter.
But I have to confess that I've been a bit lax lately and while I've been scooping regularly, it's a good 2 weeks since I scrubbed and disinfected the tray and it must be 2 months since I last did a complete change of litter. Anyway, I was in a rush this morning and didn't have time to scoop, but since I did it very late last night, I reckoned it could wait until I got home from work. As planned, I scooped a bit earlier this evening because of that. Jaffa then went and did a poo in it so I decided to get the scoop and reach in through the flap (it's a covered tray with a flap) to scoop that out without taking the lid off. Let's just say that I wished I'd been wearing a gas mask!
It wasn't the poo that was causing all of the smell - it was the general odour of a box that hadn't been properly cleaned for some time. It was gross and I can't believe I was making my boys go into that to do their business! It may have been gone 11pm but I've just emptied it and done the scrub/disinfect so at least now it doesn't pong. I feel like such a terrible meowmy! And a very lucky one that they continued to use it even when it was stinky.