Hot, sticky weather means it’s time for skin care’s double feature: sunscreen in the matinee slot, cleanser after dark. Both product categories have a way of leaning into nostalgia while improving upon the script, as with Vacation’s reboot of SPF baby oil and facialist Sofie Pavitt’s new Clean Clean, unapologetically sudsy. (She loves a foaming face wash: “I think it’s time to bring her back.”) Channeling the spirit of two summer blockbusters, Barbie and The Little Mermaid, the season’s standouts line up in kitsch fashion, underwater and up where there’s land.