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You are using an antifungal, steroid
and antibiotic combination. Why don't you use a plain antifungal cream like 2% ketoconazole
instead. Apply twice a day for 3 weeks. If it is still bad after a week of treatment it is better to show a dermatologist
as it could be LSC or intertrigo
which needs a different treatment. Keep the area dry. An antifungal dusting powder will help. Avoid excessive washing with hot water, or soap or dettol.
hope this helped.