Ditto Dat^^^I wouldn't put anything scented in, especially chemical filled artificially scented things, in with birds as they have sensitive respiratory systems.
Plus I find the whole aroma therapy thing is suspect for humans,
let alone birds who can't tell you if they feel more relaxed or whatever....
...or tell you if they feel like they can't breathe with all that miasma of scent surrounding them. I know it can give me a sick headache.