If you have hypersensitivities to chemicals, do not Not NOT use a laundromat. If your washer is bust, wash by hand or find a neighbor who is equally sensitive and will let you use their safe machine.
If your machine has to sit for a while (as our did, because it was bust), open the door so the inside dries. (Dark plus wet equals mold and mildew.)
Front loading washers trap debris in the rubber door gasket and in the detergent dispenser. This debris collects stuff (like stinky fragrances) and holds on to them. It also stays wet. Dark plus wet equals mold and mildew.
If you were stupid and took your clothes to a laundromat, the oil-based fragrance they collected from the debris at the laundromat will next transfer to the debris in your own washer and contaminate everything you wash … over and over and over.
Even if you were not stupid in a laundromatty way, you still need to clean the gasket and dispenser monthly with a toothbrush, rags and bleach or vinegar. Even if you use safe, unscented laundry products, these things will still grow mold and mildew, which will gas you whenever you open the washer and make your clothes and towels smell like dirty feet.
Cleaning the gasket: Don’t forget to put your fingers inside the gap in the rubber gasket and pull forward to get at trapped crud.
Cleaning the dispenser: Pull it as far out as it will go, then look for a tab that releases it so you can remove it completely. After scrubbing and replacing everything, run a hot cycle without clothes to flush the machine out.
If your washer has gotten totally stinky, do the hand cleaning, then run the first no-clothes hot cycle with bleach, a second with vinegar and a third with just hot water. After that, clean monthly to avoid future problems. (I don’t tolerate bleach, so we used borax. Dunno if that helped or not. I should have taken chemistry.)
If your clothes are contaminated by oil-based fragrance and/or musty aromas that are being super stubborn, it might help to add essential oils to the load. Drip them on to a washcloth or sock or something and toss in with everything else. It helps. Don’t ask me why. (I wonder if I’d understand if I’d taken chemistry.)
Oils I used: lemon, tea tree, pine, eucalyptus, rosemary, lavender. I was desperate so used 3 drops each, 18 drops total, for a load of towels. It made an enormous difference and I could not smell the essential oils at all. So far as I could tell, they bound themselves to the toxic fragrances and flushed themselves out of my house.
Praise God and thank you all for your prayers and advice.