For putty knives that require light cleaning Thoroughly wipe it down with a dampened wash cloth. If the putty residue proves somewhat stubborn, you may require the aid of a mild brand of soap. This method of cleaning is very effective in getting rid of putty residue that has not had ample time to dry. For particularly dirty putty knives You will require the aid of a stainless steel cleaner. Apply your cleaner to a clean washcloth or absorbent sponge and proceed to vigorously wipe your putty knife clean. If it's been a while since the tool's last cleaning, be prepared to put forth extra elbow grease. If properly executed, this method of cleaning will have your putty knife spotless and shining in no time. Kindly Notice: keep these knives out of reach of children.