Filters should be cleaned at least once a month or more often if needed.
To remove, slide the grease filter back slightly and pull it downward.

Soak grease filters in hot water and a mild detergent.
Rinse well and shake to dry.
Do not use ammonia or place in a dishwasher. The aluminum will darken.
To reinstall, slide the filter in on the back side and push it upward to secure it.
Do not operate the hood without the filters in place.