Mould!!!!!!!!

Help! This winter has played havoc with our cratch cover. The problem is not enough ventilation and we are trying very hard to find some sort of solution. What I wondered from all you fellow bloggers out there is have you any ideas of how to get rid of it? I have tried Milton and someone suggested vinegar but none of these have worked. Today I am going to scrub the whole cover with a carpet cleaner and then dilute some Dettol and rub that in but if anyone has any better ideas please please let me know.