Di Grassi apologised to the stewards and vowed that it would not be repeated in the future and revealed to the press that he made the decision .
Punta del Este 's hot weather conditions caused Di Grassi 's previous pair to soak up body sweat .
Di Grassi apologised to the stewards and vowed that it would not be repeated in the future and revealed to the press that he made the decision because Punta del Este 's hot weather conditions caused his previous pair to soak up body sweat .