It is best to clean your knives right after using them. Hand wash in warm water using a damp cloth and a gentle dishwashing soap. Dry carefully.
Keeping a sharp edge on your Wusthof knife is really important. Compensating for a dull blade by adding additional force can be dangerous. A sharp knife is a safer knife.
For more info on cleaning and caring for your Wusthof knife, visit our blog Knife Know How.