2. Use a silicon mask
This creepy looking contraption has a simple function. You wear it over your sheet mask!
The silicon mask forms an airtight barrier over the sheet mask on your face, and prevents the essence-y goodness in your sheet masks from evaporating into the air. Less essence lost to the air = more for you! As an added bonus, the seal also keeps your sheet mask in place so you can actually move around and get things done without worrying about your mask falling off! With benefits like that, who cares if it makes you look like a blobfish.
These silicon masks are washable, reusable, and available at Daiso or online!
Related: The 5 Best Beauty Buys From Daiso