This is the only foam cleanser I’ve ever finished two bottles of, haha. It’s the Etude Soonjung Mild Acidic Foam Cleanser! The cleansing power isn't super strong, but that makes it gentle enough to cleanse without irritating the skin. Since it’s mildly acidic, I’ve never felt any stinging or burning sensation on my skin! I think those who like a squeaky-clean feeling might not like it, though.
It keeps my skin moisturized and doesn't feel dry even after washing my face, so I personally really love using it haha. On days when I wear makeup, it's a bit hard to tell if it's been washed off completely, so I wash it twice haha. I like that it doesn't irritate my skin even when I wash it twice. It's the perfect gentle product.