...before every take of a makeout scene

https://hollywoodlife.com/2020/09/24/kj-apa-camila-mendes-make-out-scenes-filming-riverdale/

Apa posted a video of him and Camila Mendes gargling mouthwash (https://www.instagram.com/p/CFf0Wq-pLoi/) under new coronavirus precautions.