A B777 FLC RETURN LAND AFTER PREVIOUSLY DETECTED FUMES INCREASED IN INTENSITY 2 HRS FROM DEP FROM DFW; TX.

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TOXIC FUMES WERE NOTICED IN FIRST CLASS GALLEY WHILE AT THE GATE BY FIRST CLASS FLT ATTENDANTS. MAINT INVESTIGATED; UNABLE TO FIND THE SOURCE. DEPARTED 45 MINS LATE. 2 HRS INTO FLT; I HAD SYMPTOMS OF BURNING EYES; HEAVINESS IN MY CHEST; BURNING IN THROAT. ODOR WAS NOTICEABLE AT DOORS 33L&R AND BY PAX AFTER 2 HRS IN THE AIR. RETURNED TO DFW (2 HR FLT TIME). DURING THIS PERIOD; SYMPTOMS INCREASED AND FELT VERY ILL WHEN WE ARRIVED DFW. RPTED TO ACR MEDICAL FACILITIES AT ARPT (ENTIRE FLT ATTENDANTS). 96 HRS BEFORE I WAS FEELING BETTER. I QUESTION SPENDING 2 HRS RETURNING TO DFW. FELT WE SHOULD HAVE LANDED ASAP. I WAS TOLD FUMES WERE CAUSED FROM OVEN CLEANER. I'VE SMELLED THAT ODOR WHEN TOO MUCH CLEANER WAS USED AND OVENS HAD TO BE CLEANED WITH WATER TO REMOVE THE EXCESS. THIS WAS A DIFFERENT SMELL. SUPPLEMENTAL INFO FROM ACN 512476: WE SMELLED ELECTRICAL/WAXY ODOR COMING FROM CEILING AREA OF DOOR 1R UPON BOARDING. FO CAME TO INSPECT AND COULD NOT DETERMINE THE LOCATION OF PROB. CAPT DECIDED TO RETURN TO DFW. FLYING TIME WAS 4 HRS 11 MINS. HAZMAT TEAM MET TO INVESTIGATE THE INCIDENT. I SUSTAINED A LUNG INFECTION FROM THE FUMES.