I have a beige couch and love set in the living room. I clean it constantly with rubbing alcohol the way I was told but I can't get the flipping thing clean. There spots from say a sippy leaking or mostly from me cleaning a dirty spot. I'll attach a close up pic so you can see. Basically I'm getting the dark ring around the spot I cleaned. Its driving me nuts because it looks dirty when its not. I can unzip the cover and take it off. I've thought about washing it, but I'm scared I'll ruin it. Then I'm really screwed. Any tips?