How to prevent gunk build up on blade?

After I'm done the task, I disassemble the king c and every time I notice there is gunk build up on the blade even though I try rinsing it under the tap. The gunk is stuck pretty good onto the blade and even the pressure from the tap water is not strong enough to clean it off. Eventually I just wipe with my fingers. As a result, this is affecting my strokes/min performance efficiency.

How to prevent this or is this just how it goes?

Thanks