What's a cooker hood grill called?

[OM2]

We have a grill over our cooker below for the extraction fan.

We'd like to replace the grills.
They can't be cleaned, the cleaner (the wife) has tried cleaning - don't work.

I tried searching for different things like cooker hood grill.
I can't find.

They look like metal trays.

What should I be searching for?

Thanks.

EDIT: just found I think... 'grease filter'
If not... and I should be looking for something else... let me know!

 

[stem]

Usually their full name is 'Cooker Hood Metal Grease Filter'

A dishwasher is usually the best way to clean them. Ours always come up as new. Put them in on their own though, otherwise food particles from the dishes may get trapped in the metal mesh.

 

[foxhole]

Need boiling water and degreaser to clean if they are very bad .

 

[Tigercubrider]

They also cost an arm and a leg. they are meant to be cleaned, not thrown away.