I hope there are some useful tips, I spend more time cleaning mine then cooking on it. Before I bought it I asked a couple of friends how good they were and on their recommendation bought it. When I complained to them how hard it was to keep clean, they both said, yeah, we found that too.!!
I don't have any trouble at all cleaning mine - I don't use any products, I just wipe it down with a cloth or paper towel after use (Note: Mine is a single portable hob).
I just use a quick spray of whatever household cleaner I have to hand and give it a wipe over every time I use it. Occasionally I use one of those hob scrapers, not very often though.
I fail to understand how they're hard to keep clean....?!?
I wash mine with a washing up sponge, hot water and Fairy liquid after every use and then dry it with kitchen towel. I've never had a problem with it. I think they're really easy to keep clean.
I am just commenting Eccles. I have never had an Aga, probably never will have, but with oven being so low it must be hard on the knees. But they do look beautiful and I bet they are fun to cook with.