Wiping with your finger introduces bacteria from your hands and is not a good idea from a food safety perspective. If you wipe the excess you should do it with a clean towel (like a disposable paper towel/napkin) or at a minimum wash your hands. It’s probably not a huge deal if the sauce is very acidic and the remainder will be used promptly but if it’s like a bottle of a condiment that may be used for weeks probably best practice to keep your grubby fingers out of there