What is your secret skin care product that you often reach for?

Even if you don't diligently take care of your skin, you strangely find yourself reaching for at least one product. So I was curious if everyone has their own skincare essentials that they've naturally settled on. Are there any skincare essentials you never expected to use, or even those you find yourself reaching for even when you're feeling lazy? For me, if something feels comfortable, it becomes my go-to skincare essential. What are your thoughts on personal skincare essentials that have survived the test of time, not just through advertising or fads?