Once you’re done waxing, clean off any excess wax residue ASAP using a post-wax cloth. Wiping off dried wax can irritate your skin, so do this while it’s still fresh. Roll the calming serum over your upper lip to soothe the skin. The stainless steel ball eliminates the need for you to touch the skin directly.
Pro Tip: if you had a spot test reaction to the cloths, use a cotton swab and a neutral oil (ideally one you already use in your routine such as squalane or any facial oil) to remove instead.