No idea, unless it has something to do with Fender putting TUNG OIL on AFTER the lacquer (see earlier in this thread) to somehow achieve/advance the "roadworn" aesthetic? I did a bunch of digging (research) today, and I've cleaned the neck with naphtha and then applied Pledge (gasp! But it's FINE... the "no pledge" thing is an Internet myth... just ask John Suhr, and yes I can provide the references if anyone is interested). If that doesn't work, I will advance to cleaning with naphtha, 0000 steel wool, clean again with naphtha, then apply wax... yes, car wax... I have both Meguire's and Turtle Wax here.... Last ditch: sand it down to wood and apply a few coats of Tru-Oil, which would be a permanent fix.