9ct engagement ring changes colour

<p>My ring changes colour. I'm very disappointed. I've been to the store three times. They told us that it needs to be cleaned. Afterwards the same thing happens. I don't want a dressing ring. It's embarrassing. Judging by the complaints on hello peter is seems as if I'm not the only one. Don't tell me about chemicals coz I don't use them. Guys it's disappointing.</p>