Thanks MD! I was more thinking I would make a few little bags to leave in there and hope the smell would go through, we have heaps of lavender in the garden- not sure what type it is but will have to check.
Actually I've got a few lavender sachets my friend made up too, just using a plain cotton, they're just as smelly as the other ones so making your own is a great idea. If you bring the lavender in, and dry it for a couple of weeks spread out in a warm place, or you could dry it quickly on loooooow temp in the oven. Then strip the flowers off and get rid of the sticky bits.