Want to access spindle to clean up a sticking tap and can't for the life of me work out how to remove the tap handle/head. Removed the inner circlip just in case, even though I know what this is for. What am I missing? I've tried WD 40 but no joy pulling the head off. I can see the hex nut inside and I suppose a monkey wrench might reach it but surely there's a way to remove the tap head to access it with a regular spanner?!!