Jonah is exactly the same, he is petrified. He trembles as well as screaming and crying. He's ok if we're both here and one of us can hold him bit if it's just me he's beside himself. I have no idea what the solution is except for persistence and hopefully he'll get used to it. If I simply can't do it I wait until we're both here, which means I can't vacuum that often but atleast he's not being traumatised.