Blacked on grease and lines

[ThinkOfTheHorses]

Just moved into a new house so getting used to the new oven.
On our oven tray we keep getting those patches of burned on black ( food?)
Does anyone know if the line in the oven trick works to shift this?
If not any other tips would be appreciated x

Do you mean the roasting tray that came with the oven? Sorry if this sounds rude, but are you cleaning it after every use? Are you leaving it in the oven when the oven is on, even if you aren't using the tray?

DP is supposed to rinse it when he uses it but tbh honest I'm at him now I keep finding it baked on. I know it's burned oil/melted cheese or whatever it is he's leaving in there. Just wondering if anyone knows how I can now get it off when the damage is done. Yes it's the tray that came with the oven.

Oven Pride - stick it in the bag with the oven shelves. Works like a dream. I hate those trays because they don't give you enough shelves so you have to use it, but it gets dirty in a way oven shelves don't. They are also bulky so if you don't leave them in the oven, you have to find somewhere for them to live.