Kitchen sink does not work

This is an old topic but I hope my answer will help someone else.

I used a premade small kitchen for my sim, so I didn't really notice the furniture at the beginning. The kitchen sink is right behind the table where they eat, so it was obviously closer than the bathroom's. They wouldn't even use the dishwasher. It was just like they didn't exist - and i Confirm this, because out of frustration I deleted the bathroom sink just to watch their reaction.

Then it clicked me. There was some decorative furniture over the kitchen sink and the dishwasher. I moved it a little bit up and it FINALLY WORKED.

It didn't seem it was a problem. I just gave it a shot, and it worked for me. Hopefully this will help others too.