Persistent jock itch (Tinea Cruris) despite treatment usually means the infection is not fully cleared or is being worsened by moisture, tight clothing, or use of mixed creams. You should continue a proper antifungal treatment for at least 2-4 weeks with a stronger antifungal cream like luliconazole or sertaconazole (as advised by a doctor), and sometimes a longer course of oral antifungal medicine may be needed instead of once-weekly dosing. Keep the area clean and completely dry, wear loose cotton underwear, avoid sharing towels, and change clothes after sweating. Very importantly, avoid steroid-containing creams, as they can make the infection stubborn and recurrent. If it still does not improve, consult a doctor for proper examination and possibly tests to confirm the diagnosis and adjust treatment.