Start with a gentle cleanse. Page Six's 2023 roundup says iS Clinical Cleansing Complex appeared in Selena's pre-flight TikTok routine, so it gets priority here as the newer source-backed cleanser.
In her 2022 TikTok routine, Teen Vogue says she used La Mer The Cleansing Foam, applying a small amount and wetting it down with Evian spray.