The morning after: wipe, spritz, scrape
Wipe out the dried paste with a damp cloth, rinsing often. Where residue clings, spritz lightly with white vinegar in a spray bottle — it will fizz against the remaining bicarbonate and lift the last film. Keep rinsing with clean water until the cloth comes away without that chalky drag, because leftover bicarbonate bakes into a white haze the next time you use the oven.
For the glass door, a plastic scraper or an old bank card at a shallow angle will shift the hard brown spots that no cloth will touch. Work gently and keep the glass wet. Many ovens allow the door to be lifted off its hinges or the inner panel to be removed so you can reach the grime that has slid down between the layers — again, the manual decides this, not a video, since the mechanism differs by model.
The parts people forget
The door seal collects crumbs and grease and is often the real source of that burning smell; wipe it with a damp cloth only, never scrub it hard, and never pull at it, because a damaged seal lets heat escape and ruins your baking. The grill pan and the roasting tin you keep "for roasties" deserve the same overnight soak as the shelves. And give the oven's outside panel and handle a proper degrease too — it is the bit everyone actually sees.
