I recently purchased a generic brand with blue caps ( no label ). When I reconstituted ,the white puck dissolved partially with some of it sticking to the wall. I had to shake the bottle to get it to dissolve and it took several shakes to accomplish. When I took Somatropoin 6 mnths ago this did not happen. The puck dissolved immediately and completely. Whats going on here? Is this normal for the generic brand? I was thinking possibly the generic had gone bad or maybe was left in the heat too long. Any thoughts or experiences are appreciated.