D1.Generally, the received goods are in a normal state. If you feel quicksand, you can adjust whether it is fast or slow 2.First, determine whether the size of the bubbles is appropriate. If the size of the bubbles is appropriate, determine the contact between quicksand, liquid and air bubbles. Too fast: The air bubbles cannot isolate the quicksand on it, the quicksand is in direct contact with the liquid, and the quicksand flows faster due to gravity. Too slow: The quicksand is in complete contact with the air bubbles, there is no gap or the gap is small, and the quicksand is slow It doesn't work properly. Sand falls all at once, What should I do? First determine whether the bubble size is appropriate，If the bubbles are too large 1. Gently shake the quicksand art, shake the fixed proportion of air inside into small air bubbles, the top is the air bubble, and the quicksand is at the bottom 2. Then it can be rotated 180° horizontally upside down, so that the air bubbles are arranged at the bottom of the quicksand, Isolate the quicksand on it，and then the sand will slowly sink from the gaps in the air bubbles. The bubbles are arranged randomly, When a small gap is formed between the bubbles, the flow rate of the quicksand will be relatively slow, forming a small peak. 3. If the quicksand is too fast or too slow, gently rotate the quicksand left and right (0-20°), adjust the contact between the air bubbles and the quicksand, and adjust the distance between the air bubbles. When a small gap is formed between the bubbles, the flow rate of the quicksand will be slower. The sand won't move, do I need to buy a syringe to fix this? Start looking for why the quicksand doesn't move 1. First, determine the size of the bubbles. If the bubbles are too small and dense, the quicksand will be blocked. If there is no space, the quicksand will not fall. In this case, you need to buy a syringe to repair, and extract some dense small bubbles, and the quicksand will start to