Funny smell

I'm not sure what's going on. A new human has been in my home. He has put weird sheets on the floor, and he stands on ladders.
He has been putting something on the walls. He reaches down into a pot, puts something in it, then rubs it all over the wall.

The walls now look different, but my home really smells. The smell is strong and gets right up my sensitive catty nose.
I've had to go to my other homes for a bit. They don't smell.

I hope the strange human, and the smell, go away soon.