Strange fluid leak?

Originally I thought I had driven through some fresh oil, and eventually power washed it off.

A long time later, it was back. So I disassembled the inner wheel well plastic and found no leak, the substance just seemed watery with no smell or notable texture. Reassembled and power washed.

Now, it has returned.

https://imgur.com/gallery/Z8vdCx7

Anyone? Is there like an intermittent ac condensation rerouting? No rain lately, so a clogged drain tube is out. No coolant loss. Recent transmission flush but fluid not related.

Halp.

Thanks.

Just thought: I actually did originally drive through a freshly oiled street; is it perhaps so soaked into the rail that when I drive in dusty dirty conditions it rises out? That sounds crazy.

If you've been running ac, that would be your answer. The condensation drain.

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