Fuel fill area not draining

[DMP84]

I went to the gas station yesterday and after a rainy day I noticed the fuel fill area does not drain, the small hole seems to have clogged somehow. I got rid of the water with a paper towel and poured a cup of water to see if the water just stays there and it does. Any idea where does this drain tube end? If there's a way to unclog it? First time I ever experienced this.

Thanks.

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[fitter_here]

Try to blow air thru the tube