Bella sits down right in front of the register, smears the oil onto the lens, and murmurs the words of the spell. She has this one memorized; it's too conspicuous to actually use, but she liked the idea behind it.

She relaxes, obviously, massively, when the magic goes through her, and then she caps the rest of her mint oil, puts it in her bag, and turns around and holds up the oiled lens in front of one of her eyes.

"Something to say?" she murmurs.