If your lanai/bird cage has the screwed down aluminum channel on top of the concrete and that's what's blocking the waters escape, try this.
Note where the water pools the deepest and loosen the three closest screws 2-3 turns. Slip something thin like a coin under (both sides) of the channel at that point to hold it up slightly off of the concrete and tighten back down. Water goes out and the critters stay out.
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