I would put it this way – can you use it? Sure you can, it will not be pleasant, but you can use it. Is this normal with creatine – I would say that no – a high quality product will dissolve in water without problems. For the next time, in order to avoid this kind of problems, I would recommend you to get Ancient Strength – it is high quality, and this creatine comes in tabs, so there will be no problems with mixing it in the water.