Over the years, on more than one occassion, I’ve bought one of those plug-in air fresheners. The only thing is that it forms such an unimportant purchase that when I next visit the supermarket and decide it’d be a good idea to buy a refill, I can’t remember the brand I bought before, and so have to go for the full kit with another plug.
Consequently, I’ve got a collection of three different brands of plug-in air fresheners, excluding that one being advertised on TV at the moment with a built in fan. However, even with this range, when I went out and bought a refill, it didn’t fit any of the models I already had. You’ll be pleased to hear that by dint of a little funnel, I transferred the perfume from one bottle to another, switched the “sponge rod” type things which pass the liquid out, and hey presto, my lounge smells like a mountain fjord or whatever. (Actually, it’s probably as well that I don’t get hayfever at this time of year).