How do you get rid of maggot?

Hi, found to my Horror that our wheely bin was crawling with maggots ! I tried fly spray - which my husband correctly told me would do nothing - then i decided to try eucalyptus oil in a 25% suspension. Hey presto - they shrivelled up before my very eyes! In Australia you can buy this product in a handy areosol - or make your own and put it in a plant spray.