Water leakage keel

After a long time of deduction I’m almost sure I’ve water leakage from the keel, but not in the position you might expect it. The keel bolds are completely dry, but water is coming from below the stringer, just in front of the coach before the kitchen sinks. That’s at the most front part of the keel, but to my knowledge there’s no bold in that position (you can’t even reach it there) I can’t understand how water can leak in this position. It only happens when sailing under sail, or with bigger waves when under motor. When the boat is moored, no water cumulates. I’m sure it’s ‘seawater’. When sailing in seawater, it’s salt, when sailing on a lake, with fresh water, the water is fresh as well. It’s leaking a couple of liters of water per hour. (2 a 3 a think). To leak water, the boat must swing, which applies pressure and movements to the keel. My idea is that water is finding its way between the aluminum contra plate and the hull. But can this happen? I don’t want to remove my keel and find out it’s something completely different.
PS. I never crashed into something with either my keel or my boat 

Hi Steve, thanks for your reply. But just because I did all of your suggestions, it's my believe now that this is the cause.
To make a note here of all the things I've done to find the (probely) source is to much of a list to write down. But believe me, all the 'normal' sources I've excluded. (Even removed the floor boards etc.)

Hi Doug, no, no Airco etc. in the boat. Only a heater, that's more required here in the Netherlands :-)

The boat is no longer 'under waranty' (7 years old), but I've had contact with the current importer in The Netherlands (West Yachting).
A couple of suggestions have been provided and now have the conclusion: this is not the case.
The actual situation I've to mail to them, but I don't think they've the solution either

Hi Paul, I don't know about you, but we don't shower with salt water. I'm 200% sure this is not the reason.