re: Advice needed. Bosch oven mistake

When silicone is burned, the silica fuses to the enamel lining of the oven, keep in mind that enamel has lots of silica in it already. It's non-toxic but looks rough. Concentrated sodium hydroxide solution applied with stainless steel wool may knock it down but you better know what you're doing and have plenty of PPE along with ventilation before trying that route. Hydrofluoric acid would probably work better but an extremely painful death is a likely outcome if it's used.