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.
yes, don’t fuck around with corrosive chemicals. Strong acids or bases will destroy tissues with ease, especially if they’re not protected by skin (which also gets dissolved but more slowly)