I have some left over olive oil from last year, but some little flies landed inside. Can it be used during this Chanuka iy”H?

As far as using oil that was left uncovered (assuming that it was the reason some flies landed inside) on question 2969 and 2969 we mentioned that most permit. Regarding just the presence of flies or a fly, even when left a small time uncovered as is most usual, Nitei Gavriel (18: 11) permits. Horav Aharon Miller Shlit’a explained that although it may be for some a bit repugnant for eating, it is not when just used for lighting.