How often should I use a sheet mask during the dry winter season?

Yesterday, I met up with some old high school friends for the first time in ages, and when I saw the group photo taken under the cafe lights, I noticed my complexion looked particularly dull. Now that I'm in my mid-thirties, I've definitely noticed that my skin isn't what it used to be. I'm trying to be more systematic about my home care routine, and the first thing I'm concerned about is how often I use sheet masks. Before, I used to just use them whenever I remembered. However, some people say one sheet mask a day is the right amount, while others say using too frequently can actually be harmful to your skin. Deciding on the right amount of sheet masks isn't easy. With the seasonal transition and the increased dryness, what are your thoughts on how often to use sheet masks? I'd like to ask. How many times a week do you usually use sheet masks? If you have any special routines that have helped improve your skin texture, please share your valuable advice.