Thank you Ang !!
That's exactly my problem... plus anything heavy bothers him so I want to find something safe AND long lasting - you've been a huge help !!
I have a Scentia Lamp that just rocks - it's the best scented lamp I've ever used
http://www.scentierlampes.com/scentier_lampes/index.asp
it last for days...You light the 'stone' & let it burn for 2 minutes -
blow it out and you have awesome scent for days with no burner ...no nothing - BUT - that flame bothers me when I have to light it.
I need to try the diffusers...they sound so safe and you don't have to light anything - thanks so much for all your information - this thread was so interesting - I'd never even heard of them before