Hi, I am a new bloodbanker and forgive me in advance for asking this question. My question is….I am afraid when reading tube agglutination I will miss a weak reaction and call it negative. I think it’s my technique. When I am reading a tube reaction after centrifuging ….I hold the tube so that the button is facing upwards and then I gently swirl while watching the button to see how it falls off. I look for any granules. Is this right ? Are there any tips on how not to over shake a tube and miss the weak agglutination . Thanks for reading my question.