Update:
I gave in I bought a third cylinder Hoover the one I got the other day was upright. I thought having a different type would be enough to ease my anxiety. Good news is the new Hoover is only £15 more and someone is buying the one I'm worried about being contaminated.
I know i need help for this as I'm also worrying about other contents in my wardrope. I feel weak for giving in but it was so powerful I felt the urge to get rid..anybody else with OCD feel the urge to dispose of stuff?