Flue Free Cleaner - Any good?

[Stereo]

It was our kettle! We had been given it years ago as a wedding gift and it's supposed to be for hotplates. My grandad passed on a few months ago and while we were clearing out we found a genuine old Aga kettle in the garden with strawberries growing in it. The lid was in the shed. I took it home and yesterday decided to clean it up. Much scrubbing later, I popped it on the Esse full of cold water and within 3 minutes it was singing away! That was with the fire door fully closed and a low fire. Putting the door on the catch with dry fuel boils it in under a minute!

 

Can't believe we didn't try this earlier. I had wondered but the price of them always put me off. Doh.