For those of you who were amongst my first customers, you've had some of those cushion covers for 18 months.
If you haven't already put them through the wash, it is time. You do not need more dust mites in your home. All you have to do is unzip them and pop them in the washing machine on 30c and they will be fresh and clean.
Go on, it's not that hard!
The Dust mite nagging fairy