We’ve got one and we live in a hard water area so it ends up looking awful. The best solution I’ve found is ordinary kitchen cleaner, dry it and then go over the whole lot with oil (the spray olive oil is perfect) and wipe with kitchen roll.
Is it granite or composite? How is it both aren’t they different things or am I being dim? We have black granite work tops and I use Method granite cleaner and an E-Cloth to dry/polish it. Not sure if that’s or any use to you but it makes our granite so shiny I can see my face in it 😬
Sounds like the same as ours, which is composite. It’s not like a granite worktop and won’t come up shiny, shiny. It’s a pain in the arse. Oil is definitely the best solution I’ve found after lots of internet searching and trial and error. There’s also some really good cleaning stuff called Bar Keeper’s Friend (you can get it in John Lewis but not sure where else stocks it) but you’ll still need to oil afterwards as it’ll leave a smoky residue.