@croydon - Unfortunately rosacea is one of those various skin diseases that are really difficult to get rid of, or even to reduce.
I had a friend once who had such terrible eczema on his elbows and knees it looked like he was wearing those guards that skateboarders wear. He'd been to doctor after doctor and none of them seemed to be able to give him a cure. In the end he realized he was just going to have to live with it and hope it didn't get any worse.
I've also had friends who just develop a mysterious rash that the doctors can't even identify. It might drive them crazy for a few weeks and then vanish. My mother has a rash on her leg that flares up whenever she gets stressed out, and she's never been able to totally get rid of it.
The skin is still pretty mysterious it seems and we all just have to do the best we can with what we know about it.