Scent-free daycare room?

Our oldest (nearly 4yo) moved up to the next age group in daycare and that classroom is apparently scent-free. There's not been a specific allergen mentioned, and they've asked for scent-free detergent, lotions, etc. be used at home for kids and parents in case the parent's scent rubs off on the kid.

We were happy to accommodate when our youngest had a teacher with a lavender allergy, and I know some people are very sensitive to smells, but this seems like an unrealistic expectation for them to have. Has anyone else dealt with this? My mom thinks they're being ridiculous and SO has no problem with it at, and I don't know what to think now.

And does anyone have recommendations for baby fine 2c to 3a curly hair that's scent free? Finally got a hair care regimen for oldest that worked, and without it they get serious frizz and tangles.