fuel soaked rx and servos
Had the same situation in my extra with a gasser on it. I took the radio RX and 1 servo apart and sprayed liberally with an electronics cleaner, (blue shower- tuner cleaner or similar)
spray liberally and let dry then put them back together. be mindful of static charges before you handle the RX innards, ground yourself first. If you can find K2R spot remover you can spray that on the soaked wood and let it dry and brush-vaccum it off when dry. Do a search on fuel soak or similar, lot's has been written on it although the tight area's in the back of the fuse may require cutting the bottom open a bit for access