Anyone using COSRX Vitamin C Serum?

The area I applied it to gets so sticky after use that it's unbearable. How do you use it? Even though I generously coat the serum with cream, when I wake up in the morning, my pillow is stained and sticky—it's so bad I can't even use it. It seems having such a high vitamin content is also a problem... I really want to keep using it, but how can I use it so it doesn't get sticky?