Which brand of coco you using? Or where did you get it? Whenever I expand my coco bricks, usually botanicare coco grow, I do exactly what the bag tells me and its all good in like 30 mins to 2 hours. once I did use some cheap bullshit coco and came out something like you, a little. How much water you use to how much coco?
What I would do is take it out the water let it dry a little bit, but still moistened and just use it from their, you should be 100% fine bro. Good luck on your grow!