A:Answer The short answer is incredibly difficult.
When cooking on the rear burners, grease and small food detritus will inevitably spray or splash through the rear grill for the vent. Unfortunately, LG has designed this vent cover to be extremely difficult to remove, if it can be removed at all.
As a result, there are two main options: either learn to ignore the grease and detritus, just pretend you don't see it. Or get a very small bottle brush and spend hours trying to clean through the vent grates.
I've had mine for about a year, year and a half. And the grease I see bothers me every day.
