Paint your couch, not your stairs.

Yeah, you read that right. You CAN use paint to update stained couches. Especially microfiber! It does not look or feel like it was painted. It will feel like soft faux-leather, you'll be able to wipe it clean, and it will smell delightful.

Here's how:

Before you paint, vacuum the couch and remove any visible sticky spots. Move the couch away from the wall and other furniture so you don't splatter paint on the other stuff. Put down a drop cloth on the floor so you don't paint the floor. Get a wet rag and some all purpose cleaner so that when you do splatter or drip (you know you will) you can clean it up.