I believe in wearing a bit of silk in your everyday life. It's a good luck charm and a treat for yourself all wrapped up in one.
In that spirit, it's important for you to know that silk is quite strong and that silk can be washed.
Washing silk causes it to loose its luster and shrink a bit, so this approach is not for everyone or every garment. If you are hesitant, an environmentally friendly dry cleaner is a good solution for you. I am lucky to live near an eco-friendly dry cleaner, so I send my silk blouses and dresses, like the Inez, Marie and Jessica, to them as needed. This business also has a delivery service... so nice while quarantining.
But I do wash many everyday silks at home. Things like vintage silk pajamas, older silk blouses and a favorite dressing gown. I wash these pieces with mild detergent and cool water, by hand or on the gentle cycle in the washing machine. I let them dry flat overnight. A cool iron the next day helps spruce them up if I've got the time.
Silk scrunchies and headbands are quite easy to gently hand wash.
For your silk masks, wash them in warm water in a mesh lingerie bag in your washing machine after every use. I wash mine in the same sturdy load as towels and everyday cloth napkins (though I let them dry flat instead of using the dryer). The silk fabric that we use for the masks has already been washed in hot water before the mask was made for you, so don't worry too much about these.
I will add, though, that if you have an older silk knit Eve Tank or Eve Slip dress, please do not hand or machine wash these. That silk knit shrinks a lot.
I hope that this information is helpful. And enjoy a bit of silk... everyday!