Help me please!

[closer]

I was taking a good look at every room and my house trying to decide what room to work on. Well I don’t have a lot of money right now, and I did want to put a new ceiling up in my bathroom and flooring.
However, I don’t have the money to do anything that drastic now. But, I have noticed my walls and how bad they look. They need a really good cleaning.

My husband works in a factory and his little paw prints are on my walls in different areas. Of course where the problem comes in is, I love the color of my walls in the bathroom and I don’t think I have enough paint left to repaint it.

The real question I have, is there any way I can clean it? It is a water based paint, flat. I have some of the paint left that I used to paint it. Can I add anything to the paint to make it stretch farther if there is no way to clean it?