Ay mama, I feel your frustration, kami din dumaan yan with my eldest and it was heartbreaking trying different things, lalo na pagbalik sa house tapos bumalik ang rashes. Based sa pattern mo (worse in your actual house, better when kayo lumipat), it really does sound like something environmental or possibly mold/humidity sa bahay kaya worth checking ulit with your pedia kung may hidden moisture, bedding, or even pet dander na trigger, some of my mum friends discovered air quality issues or even fabric softener allergy this way. Since you've already done rounds with ointments and antibiotics, I'd lean towards going back to your pedia or derma one more time to ask specifically about environmental triggers or if kailangan ng skin barrier repair instead ng more treatment, because parang hindi lang simple rash lang ito based sa how it keeps coming back. Sending strength, mama, you're doing your best na!