Hmm I think minky would be fine as it's polyester, which I *think* is quite tough (microfibre and fleece are both poly) but I wouldn't put money on it. TBH I would just stick with the washing machine and use the temperature controls - most machines have a boil wash if you really want it hot, but check labels.
Bio detergant also tried non hip before and still same both bits smell but inserts worse. The smell straight after full dose detergant so aibt bothered rinsin yet til the smell goes. Thats why I was thinkin vininger, if not that what would you suggest
I'd try doing the inserts and the outers separately - do the outers again with the detergent strip. If they come clean, great, then you can do the inserts with any of the other methods as MF will be fine with whatever you want. Also, how many are you doing at once? I'd do no more than 10 and use the longest possible wash cycle. Sorry if you've already answered this but have you cleaned the machine too?
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