RaeLynn's diaper rash

Raelynn's diaper rash doesn't seem to be getting better. So heart pain to see her cry. :( We are already changing her diapers like nobody's business but she keeps having a bit of poo when she farts and sometimes we won't know to change if she's sleeping. We use Mamy poko so I don't think it's the diaper problem. Anyway, decided to hold of Desowen (eczema cream since it doesn't seem to help) and stick to Desitin. Hope it helps or else will start airing her bottom liao or using cloth diapers liao. :P