* A razor blade and/or your fingernails. Sometimes, you need to pick or scrape a stubborn bit of dirt or grime off. Hand-care gurus say that you should never use your nails as tools. Common sense and millennia of human wisdom says you should it's what your fingernails are for, after all. They're not just there to collect dirt and to apply polish to. And you probably pick at little bits of grime on the window, the table top, etc. with your nails instinctively, anyway.