Not mine! A friend looks after holiday homes. One of them doesn't get let very often and she finds it difficult to freshen it up when guests are due. She can't leave windows open or use scented candles for obvious reasons and she hasn't been able to find a scent diffuser which doesn't make the place smell like a funeral home/public lavatory. We live in rural France so she might not be able to buy the proprietary brands you can get in UK. Any suggestions? Maybe tips from your gran?