After my skin allergies were identified (by proper patch-testing, not anything woo) it took a few months to wash all the residues out of clothing, bedding, towels, my entire domestic environment. And to change every product I used. I didn't see any results in this time. I was on a fairly strong treatment regimen for the active rashes (2% hydrocortisone ointment, pimecrolimus ointment, and a 3rd ointment that I don't remember) which eased them.
Once my environment was clear of my allergens my skin began to heal. It took about a year to fully heal, with occasional breakouts which I treated with the ointments.
Fragrances are among my allergens. It doesn't matter whether or not they are listed as ' natural'. Even a natural fragrance can be so concentrated that it acts as an irritant. So everything I use is strictly fragrance-free.
I'm also allergic to propolis, so I have to avoid beeswax products touching my skin. I'm OK with candles, though too much airborne fragrance can make me itch.
Fabric conditioner is a real bugger for fragrance, and the residues can be very difficult to wash out. If you can bear not to use any fabric conditioner for several washes per item, the residue will wash out faster and then you can go back to conditioning with one that is tolerable to you.
Products that work for me:
None of the OTC creams. I find greasy ointments far more soothing than anything with an aqueous base.
Cold pressed virgin coconut oil. It is the absolute best moisturiser for me when my skin is at all irritated. The tiniest scraping or dab covers my entire face without making it shiny. Another dab for neck and decolletage. If there's any shine then I've used too much and I rub it off with my forearms.
If I have a flare-up, then I go straight for 1% hydrocortisone ointment. I don't tell the pharmacist if it's for my face.
Waitrose is my friend. They usually stock Surcare laundry products and washing up liquid, and occasionally Fairy and own-brand fragrance-free household products. I'm about to try Ecover's fragrance-free fabric conditioner, too.
Waitrose also stock lots of fragrance-free body and hair stuff. I prefer their own-brand range, Pure, to Simple and Sanex. They have loads of f-f block soaps, too.
I look at blogs and old-fashioned household economy books to find cleaning strategies that do not require heavily fragranced branded products - those products often carry warnings that some of their nastier ingredients can trigger allergic reactions.
Hope some of this is useful to you. IME it can take months for my skin to recover from exposure to an allergen, even after I've got rid of the allergen. But the healthier my skin is, the faster it recovers. Moisturising, internally and externally, with the right moisturiser, is very important.