Hi Kim,
We are glad to help with cleaning the filter on your Samsung microwave model.
Your microwave model has two types of filters (Grease and Charcoal). The Grease Filter can be cleaned; however, the Charcoal Filter can only be replaced. I have shared this model's user manual link below. Please turn to page 22 for the steps in cleaning the Grease filter and turn to page 23 for replacing the Charcoal Filter. Turn to page 10 for removing the "Filter" message on the control panel after cleaning and replacing the filters.
Should you need more assistance, please feel free to get back to us via the following options:
1. Facebook Messenger: http://m.me/samsungsupport
2. Twitter: https://twitter.com/messages/compose?recipient_id=18768513
3. Samsung Community: https://us.community.samsung.com/t5/Samsung-Community/ct-p/us
When you message us, please provide us with this reference number 1146710903 to help our team pull up your information.
Leo