I would like to ask about the frequency of using the mask pack.

How often should I use a sheet mask?

My skin has been looking dull lately, so I'm thinking about using more sheet masks. But I'm not sure if using them frequently really helps.

I'm curious about how many times a week it's appropriate to use a sheet mask. I'd also like to know if I should use different skincare routines on days I use a sheet mask and days I don't. For those of you who frequently use sheet masks, please share your tips.