I had lost hope with my electric cooking plates. The white circles where completely hidden under a layer of diamond-grade burn residue that no amount of scrubbing with chemicals could even begin to remove. I found this 3€ scrapping tool and it’s amazing !!! Sorry, but I don’t have the before picture, believe me after 6 years of usage, it was bad.
I’ve made beer a few times, but I’m super meticulous when I do it because I don’t want all that money and time to go to waste because of mistakes or contamination. So I’ve never had any serious beer making accidents.