Using your MarshallTown 6 - inch blue steel taping knife is easy. First, load the drywall compound onto the blade. Then, apply it smoothly over the seams or cracks on the drywall. For corner work, use the tapered end of the blade to get into those tight spots. When you're done, clean the blade with a damp cloth to remove any remaining compound. Make sure to dry it thoroughly to prevent rust. Store the knife in a dry place. Avoid using it on rough or hard surfaces that could damage the blade. With proper use and care, this taping knife will serve you well for a long time.