historically people burned lavender oil because it repeled fleas (they even used lavender for the black death) so it wouldn't be surprising if it kept them away.;


plus they are light sensitive, when you are burning things you are probably awake, or at least have some light source, they hate light!



*edit* not to freak you out or anything, but the reason you may not have seen them could also be BECAUSE you have a messy room. More stuff for the little guy to hide under!