One gal said she rubs bar soap under her nails so the dirt washes out easily at the end of the day. Otherwise I buy the rubber gardening gloves from Costco gardenia latex gloves.
I have a hard time keeping gloves on. Our dirt stains my hands & feet. I soak them in warm water with a bit of mouthwash. It sounds strange but it works like a charm.
I don't wear gloves either. I cut a lemon in half, put one half in a bowl and knead it with my fingers, digging my nails into it. 5-10 minutes. Works every time.
I used to hate to wear gloves but in construction I was required to wear them 100% of the time for safety. You adapt and get used to them for all things except tape. Now I am uncomfortable not wearing them. But I still get my nails and cuticles dirty. I need to try the soap trick.