In for a penny. We have a decent sized upstand (same material as worktop - Quartz) that doesn't go all the way to the extractor. That obviously wipes clean, and the only reason we need a lick of paint there is because we haven't gone over the base white yet.
So in answer to the original question - re the upstand that isn't extractor height - you need to be doing some Why Don't You style cooking to get stains that high on the wall.
Er another guilty of form over function kinda - we have 100mm plain white tiles - I cook like a hooligan fry the shit out of things and pay no heed to what goes where. I just clean it each time it gets splattered.
In for a penny. We have a decent sized upstand (same material as worktop - Quartz) that doesn't go all the way to the extractor. That obviously wipes clean, and the only reason we need a lick of paint there is because we haven't gone over the base white yet.
So in answer to the original question - re the upstand that isn't extractor height - you need to be doing some Why Don't You style cooking to get stains that high on the wall.