SB1 front grille removal?

I have spent a lot of time looking for any information on this so please forgive me if I have somehow missed something right in front of me on the forum.

I just need to remove the grille to clean some Play-dough that my son smeared all over it. I am technically savvy and can easily handle large electrical projects but I do not want to attempt to dive into this without some guidance. There may be a very simple trick....that I may over think.

Does anyone have diagrams or know how to remove the grille? Thank you in advance.

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