Thanks so much for your suggestions, ladies! I cleaned the walls with the Vanilla spray that smiles4u suggested (which smells AMAZING!) and got the tough spots (pencil/crayon marks etc) with a bit of cream cleanser. So far I've only done the hallway and lounge room but the entire house smells just gorgeous - and who knew the walls were so white under all that dust?

Fleur, the lemon oil idea on light fittings etc sounds delish, too - will definitely have a go at that! I might try and slip one of the new Glade vanilla candles into the grocery shop tomorrow heheh I looooove vanilla smells!

Thanks girls, I really appreciate the suggestions