If you order a groomer mask and you want 
doTerra oil added to your mask, choose this per each mask.  1 mask x1 etc.
Choose, onguard, lavender, peppermint, oregano.  Not sure why, ask me.
 
I would use onguard to help clean my mask.
I would choose lavender as a calming oil.
I would choose peppermint as a livening oil.
I would choose lemon, uplifting, vibrant.
 
I am not a Doctor, these are practices I use on my own groom masks and I love and want to share.  If you want oils of your own, let me know which ones, or order on the doTerra oils products I have here on my online store.