We have two old cats, 19 & 17. Both are in pretty good shape but the 19 yo is deaf and half senile. No reason to put her down, she's just getting old. She has a hard time hitting the litter box and ends up peeing on the floor, so I got a plastic tray to put under the litter box. We add a pad and that takes care of most the problem. Occasionally we have to take it out in the back yard and rinse the tray off. The other day I came in and the tray was in the kitchen sink. I asked my wife why the hell was it there and not in the back yard. She said the back faucet was covered and she couldn't use it. I told her the cover comes off in 10 seconds, but even so, why didn't she just wash it off in the shower and not the sink. She said she bathes in the shower and didn't want to get it dirty with cat pee. I ask her if it made her feel any cleaner by washing it out in the sink we use to clean our cooking utensils, plates and silverware. Tone and silence.