Is there any cleaning utensil that is comparable to fingernails? As you know,  sometimes the best scraping tool in the kitchen for cleaning up is your own fingernails.
The only thing I know of that compares in terms of effectiveness is metal, but you shouldn't use metal on many things,  such as cast iron or teflon pans.
Is there anything that can match the effectiveness of fingernails, but that isn't so hard it scratches like metal?
Try searching for &quot;pan scrapers.&quot; I have a pair from Lodge that has served me well, though you can find almost identical scrapers without the branding.

These are essentially equivalent to the scrapers mentioned by ChrisH, but with curves to make it easier to clean the edges of your pans