Not literally died but gone rotten/mouldy something awful! I haven't used my Hoover (Dyson) for months as I have cleaners and all hard floors downstairs which I sweep so I rarely use it and I hadn't noticed - although the cupboard it was in was getting stinky - I thought it was damp! The smell is abominable. I've soaked the cylinder in detergent but it didn't work AT ALL. Any suggestions?