Dullness becomes more prominent in winter. How do you all plan your whitening care routine?

Yesterday, it was so cold that I had a spicy mala-tang on my way home from work, and oh my, even at 6:45 this morning, my lips still feel numb. The spiciness makes my lips look rosy, but I don't know why my skin tone looks so sallow in the mirror... As I get older, I think I'm starting to see more freckles and blemishes. So, I'm asking: What kind of whitening routine do you guys pay special attention to during the winter? Honestly, I used to just ignore whitening routines, saying it was too much of a hassle, and just slather on a vitamin serum. But now that I'm living under the heater all day, my skin is drying out and my skin tone is getting duller. I'd love to establish a proper whitening routine and brighten my skin tone, but it's not as easy as I'd like. There are so many great face masks and ampoules out there these days. Do you have any tips on a classic whitening routine that even people with dry skin can follow without any hassle, even in the winter? I would really appreciate it if you could share any inner beauty products that are said to be good for whitening, or even small habits you follow separately! I was getting ready for work when I looked in the mirror and suddenly felt upset, so I'm posting this... It's cold outside, but I hope everyone starts the day with a clear and bright mind!