If you're able to close the lid with the mounting bracket on, we suggest you do so.
The adhesive is non permanent, but pretty strong so you might not be able to take it away with only your fingers.
If you want to remove it, we suggest you using a thin object (like plackers dental floss, a guitar pick, a credit card, a thin tread) and slide it between the magnet and the screen. Gently bend the object backwards so that the magnet detaches.

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