I didn't know, but it seems to have PEG ingredients, which is a red flag. It's like a hidden gem that's not very popular, so I'm worried it might get discontinued.

On the contrary, I use it daily and really like it. I just make sure to do a thorough makeup cleansing step beforehand and only use a small amount to work up a good lather.

The method of use is important. I use the exfoliating product once a week, but you absolutely should not use it daily. A small amount is sufficient to effectively remove dead skin, so if you pour out a lot and rub it all over your face, your face will sting like the reviews you mentioned.

Use the exfoliating product about once a week on a thoroughly cleansed face. Dispense an amount the size of a soybean, mix it with a bit of water in your hands to dissolve it, then start by massaging it onto your nose where you have a lot of blackheads. Gradually work it into areas with more dead skin, then areas with less. If you massage for too long, it will start to irritate the actual skin, not just the dead skin, and it will start to sting, so don't massage for too long - just about 2 minutes is enough. Even so, the effects are still sufficient!