I was considering trying Feliway again to help keep my cats calm and happy during an upcoming extended trip where they will be left at home with a pet sitter, but the last time I used one of the diffusers it leaked all over the place and made a really big mess. Reviews on the feliway diffusers don't seem to be much improved - and in fact - are worse now than they were when I used one a few years ago, so I'm wondering if anyone has tried using the refills in a different diffuser - perhaps an essential oil diffuser or some other type of device?