I recently cooked-up some Rhubarb; then, as is often the case, I went off to do something else, and forgot about it.
Well, of course it boiled over, leaving an unbelievably sticky mess all over the top of the hob. Being lazy, I left it for later (I hope Lady Magnon isn't reading this; she's in Australia).
'Later' arrived yesterday morning when I could no longer bare to look at it, and I reluctantly decided to tackle the dreadful looking burnt-on crust. It took me about 30 minutes to remove all the enamel-like lava, that clung to every crevice.
Surely, each hob manufacturer should provide a never ending tear-off roll of tin foil templates, that fit neatly over the whole hob (leaving the exact sized holes for the burners). These could then be thrown away and replaced as required.
I've never liked cleaning, and grubby encrusted hobs must be the worst!