I have three giant floor cushions (about 40inches square) which my parents have had since the 70's. Me and my mum are going to get them recovered ready for the new line of the family (due feb) to clamber all over them like me and bro used to when we were tiny. But thinking they could probably do with a good clean first. I think they are too massive for even a giant launderette machine although I imagine they would wash quite well. So is my only option dry cleaning? We will make the covers washable and removable but i think the cushions probably have 40 years of dead dust mites in that probably want removing.
I seriously love these cushions and there is defo lots of life in them yet so getting rid and buying new (have never seen ones as big and fat as these ones anyhow) is not an option.
Maybe you could give them a good hoover, then leave out on the line on a nice day to air out and then hoover again and give a spray with something antibactiral? Maybe add some essential oils to freshen the smell (and most are antibactirial too).